Inorganic Chemistry Questions
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Inorganic Chemistry
Preparation and Properties of CompoundsShow the correct link to describe the type of solution:
Sugar completely dissolves whenadded to hot coffee
A layer of sugar forms on thebottom of a glass of iced tea
Sodium chloride crystals do notdissolve in solution
Inorganic Chemistry
Preparation and Properties of CompoundsWhat is the oxidation number of bromine as a reactant and in the product?
Br in Br₂
Br in Al₂Br6
Inorganic Chemistry
Qualitative analysisWhat mass of iron(III) hydroxide precipitate can be produced by reacting 85.0 mL of 0.290 M iron(III) nitrate with 199 mL of 0.200 M sodium hydroxide?
Mass =
Inorganic Chemistry
S Block - Group 2What mass of ammonia (NH3) will form when 8.6 g of N₂ reacts with enough H₂
to react completely?
N₂ (g) + 3 H₂ (g) → 2 NH3 (9)
2.05 x 10³ g
10.5 g
20.9 g
2.62 g
Inorganic Chemistry
Qualitative analysisA chemistry student weighs out 0.163 g of acrylic acid (HCH₂CHCO₂) into a 250. mL volumetric flask and dilutes to the mark with distilled water. He plans to titrate the acid with 0.1700 M NaOH solution.
Calculate the volume of NaOH solution the student will need to add to reach the equivalence point. Round your answer to 3 significant digits.
Inorganic Chemistry
Qualitative analysisA chemistry student weighs out 0.158 g of ascorbic acid (H₂C6H6O6), a diprotic acid, into a 250. mL volumetric flask and dilutes to the mark with distilled water. He plans to titrate the acid with 0.1000 M NaOH solution.
Calculate the volume of NaOH solution the student will need to add to reach the final equivalence point. Round your answer to 3 significant digits.
Inorganic Chemistry
D Block elementsGiven the two reactions
3. PbCl₂ (aq) = Pb²+ (aq) + 2Cl¯ (aq), K3=1.87x10-10, and
4. AgCl(aq) Ag+ (aq) + Cl(aq), K4 = 1.26x10-4,
what is the equilibrium constant Kfinal for the following reaction?
PbCl₂ (aq) + 2Ag+ (aq) = 2AgCl(aq) + Pb²+ (aq)
Express your answer numerically.
Inorganic Chemistry
Classification of Elements and PeriodicityNi(OH)₂ + HPbO₂- ---> NiO₂+ Pb+ H₂O+ OH-
In the above redox reaction, use oxidation numbers to identify the element oxidized, the element reduced, the oxidizing
agent and the reducing agent.
name of the element
oxidized:
formula of the oxidizing
agent:
name of the element
reduced:
formula of the reducing
agent:
Inorganic Chemistry
Preparation and Properties of CompoundsDraw the Lewis structure for BF3 in the window below and then answer the questions that follow.
• Do not include overall ion charges or formal charges in your drawing.
/
Inorganic Chemistry
Preparation and Properties of CompoundsSulfur dioxide gas and liquid water are formed by the decomposition of aqueous sulfurous acid (H₂SO3).
Write a balanced chemical equation for this reaction.
Inorganic Chemistry
Classification of Elements and PeriodicityThe oxidation number of H is +1 and of O is -2 in most compounds. Although this statement
applies to most compounds, a few important exceptions occur.
• When H forms a binary compound with a metal, the metal forms a positive ion and H
becomes a hydride ion, H. Thus, in CaH₂ the oxidation number of Ca is +2 (equal to the group
number) and that of H is -1.
Oxygen can have an oxidation number of -1 in a class of compounds called peroxides. For
example, in H₂O₂, hydrogen peroxide, H is assigned its usual oxidation number of +1, and so O
is -1.
The algebraic sum of the oxidation numbers for the atoms in a neutral compound must
be zero; in a polyatomic ion, the sum must be equal to the ion charge. For example, in HCIO,
the H atom is assigned +1 and the O atom is assigned -2. This means the Cl atom must be +7.
a. POCI3
Oxidation number =
b. C₂O42-
Oxidation number =
c. HSO4-
Oxidation number =
Inorganic Chemistry
Qualitative analysisShow the correct link to the experimental conditions on the right:
Supersaturated
Dialysis
Diffusion
Osmosis
• Copper ions can pass through a semi-permeable membrane while
starch colloidal particles are held back
• When a few crystals of potassium permanganate were added to an
undisturbed water sample, it shows a purple coloration slowly
expanding through water.
• Water molecules pass through a semi-permeable tissue membrane
from a 0.89% salt solution to a 10% salt solution
Solution in which addition of sodium chloride crystallizes
Inorganic Chemistry
Classification of Elements and PeriodicityDetermine the oxidation number of each element in the following:
a. NH3
N:
H:
b. SO32-
S:
O:
Inorganic Chemistry
Classification of Elements and PeriodicityWhat is the total number of valence electrons in the Lewis structure of SeF2O?
electrons
Draw a Lewis structure for SeF2O.
If the species contains oxygen, do not draw double bonds to oxygen unless they are needed in order for the central atom to obey the octet rule.
Inorganic Chemistry
Classification of Elements and PeriodicityDetermine the oxidation number for each atom in H3ASO3.
As:
H:
O:
Inorganic Chemistry
Preparation and Properties of CompoundsA chemistry student weighs out 0.0576 g of formic acid (HCHO₂) into a 250. mL volumetric flask and dilutes to the mark with distilled water. He plans to titrate the acid with 0.1900 M NaOH solution.
'Calculate the volume of NaOH solution the student will need to add to reach the equivalence point. Round your answer to 3 significant digits.
Inorganic Chemistry
P Block - Group 14Mass of copper wire
Mass of filter paper + product
Mass of filter paper
Mass of copper (II) oxide
1. Using your data, calculate how many moles of copper you used in reaction
2. Look carefully at the three reactions you have performed. What is the mole ratio
between copper in reaction 1 and the copper (II) oxide produced in reaction 3? Using
that information, calculate the theoretical yield of copper (II) oxide using stoichiometry.
(Assume copper is the limiting reagent.)
Inorganic Chemistry
HydrogenDraw the Lewis structure for NO₂F in the window below and then answer the questions that follow.
What is the electron-pair geometry for N in NO₂F?
What is the the shape (molecular geometry) of NO₂F?
Inorganic Chemistry
Qualitative analysisCalculate the solubility of oxygen in water at 25° C when the partial pressure of oxygen
is 0.22 atm. The Henry's law constant for oxygen in water is 1.3 x10 mol/L.atm 8pts
218 g of glucose (molar mass 180.2g/mol) is dissolved in 460 ml. of water at 30° C. The density of water is 1.00g/ml. The Vapor pressure of pure water is 31.82 mm Hg. What isthe vapor pressure of the solution? How much is the vapor pressure lowering? 20 pts
Inorganic Chemistry
Qualitative analysisCalculate the volume of 0.660-M NaOH solution needed to completely neutralize 16.3 mL of a 0.360-M solution of the monoprotic acid HBr.
Inorganic Chemistry
Qualitative analysisSort the following molecules according to increasing bond angles about the central atom:
SF6, IF 5, NF3, CIF₂-
IF5, SF 6, NF3, CIF₂-
SF6, CIF2-, NF3, IFS
SF6, NF3, IFS, CIF₂-
IF5, NF3, CIF2-, SF6
CIF₂-, NF3, SF6, IF5
Inorganic Chemistry
Preparation and Properties of CompoundsFor the following electron-transfer reaction:
Pb²+ (aq) + Zn(s) → Pb(s) +Zn²+ (aq)
The reduction half-reaction is:
Inorganic Chemistry
P Block - Group 17Create the Lewis structure of CF44 NOTE: do only the step asked for in each part and then click Check-don't work ahead to solve the final structure.
Step 1.
Count valence electrons in the molecule or ion. Do this by adding the periodic group numbers for each atom in the structure and adjusting for charge. Enter
and Check.
Step 2.
Connect each pair of bonded atoms with a single bond by dragging bonds onto the molecule. Each bond decreases the number of available electrons
by 2. Check.
Inorganic Chemistry
Coordination compoundsWhen the following equation is balanced properly under acidic conditions, what are the coefficients of the species shown?
I2 + Pb2+ ---> IO3- + Pb
Water appears in the balanced equation as a (reactant, product, neither) with a coefficient of
0 for neither.)
How many electrons are transferred in this reaction?
Inorganic Chemistry
Preparation and Properties of CompoundsThe reaction represented by the equation:
C(s) + H₂O(1) CO(g) + H2(g)
was carried out at 27°C. If the enthalpy change was 4500 J and the
entropy change was 12 J. What was the free energy change AG?
Inorganic Chemistry
Classification of Elements and PeriodicityPlease complete the following reactions, and show the molecular equation, ionic equation and the net ionic equation for each equation:
6. K3PO4(aq) + Al(NO3)3(aq) →
7. Bel2 (aq) + Cu₂SO4(aq) →
8. Ni(NO3)3(aq) + KBr(aq) →
9. cobalt(III)bromide + potassium sulfide
10. barium nitrate + ammonium phosphate →
11. calcium hydroxide + iron(III) chloride →
12. rubidium fluoride + copper(II)sulfate
Inorganic Chemistry
Preparation and Properties of CompoundsIf you wanted to prepare 50.0 mL of hydrogen, collected over water at 25°C on a day when the barometric pressure was 730 torr, what mass of aluminum would you react with a hydrochloric acid? (Balance the equation first.
Al(s) + HCi(aq)+H2(g)
Inorganic Chemistry
Qualitative analysisA sample of iron reacted with hydrochloric acid. The liberated hydrogen occupied 40.1 mL when
collected over water at 27°C at a barometric pressure of 750 torr. What is the mass of the sample of iron? (Because of the collection of gas over water, the vapor pressure of the water must be subtracted
from the barometric pressure to find the pressure of the hydrogen gas.)
If you wanted to prepare 50.0 mL of hydrogen, collected over water at 25°C on a day when the
barometric pressure was 730 torr, what mass of aluminum would you react with a hydrochloric acid?
(Balance the equation first.)
Al (s) + HCI (aq) → AICI3(aq) + _H₂(g)
Inorganic Chemistry
Classification of Elements and PeriodicityThe chemical functional group cyano (CN) is an extremely toxic chemical due to how it binds to the iron in our hemoglobin. When the chemical species is further reduced by two electrons, they are donated into a specific orbital in the MO diagram that changes its properties. Please draw the MO diagram for CN³- showing correct energy positioning for atomic and molecular orbitals. Please also calculate the bond order, and identify the HOMO and LUMO.
Inorganic Chemistry
Qualitative analysisA 12.8 g sample of an aqueous solution of hydrochloric acid contains an unknown amount of the acid. If 20.4 mL of 0.634 M sodium hydroxide are required to neutralize the hydrochloric acid, what is the percent by mass of hydrochloric acid in the mixture?
Inorganic Chemistry
Preparation and Properties of CompoundsFor each of the following equilibria, write the expression for the equilibrium constant K. and state their units.
1. 2NO2 ---> N2O4
2. N₂ + 3H₂ ---> 2NH3
3. CH3CH₂CO₂H(1 ---> CH3CH₂OH(CH3CH₂CO₂CH₂CH30) + H₂O
Inorganic Chemistry
Qualitative analysisCalculate the volume of 0.410-M NaOH solution needed to completely neutralize 64.8 mL of a 0.820-M solution of the monoprotic acid HCl.
Inorganic Chemistry
Classification of Elements and PeriodicityCIO4- + H₂S ---> CIO3- +S+ H₂O
In the above redox reaction, use oxidation numbers to identify the element oxidized, the element reduced, the oxidizing
agent and the reducing agent.
name of the element
oxidized:
formula of the oxidizing
agent:
name of the element
reduced:
formula of the reducing
agent:
Inorganic Chemistry
P Block - Group 13The reaction between aluminum and bromine is an oxidation-reduction reaction. What is the oxidation number of aluminum as a reactant and in the product?
Inorganic Chemistry
Classification of Elements and Periodicity2Cr³+ + 3Cu²+ + 7H₂O ---> 3Cu + Cr₂O72- + 14H+
In the above redox reaction, use oxidation numbers to identify the element oxidized, the element reduced, the oxidizing
agent and the reducing agent.
name of the element
oxidized:
formula of the oxidizing
agent:
name of the element
reduced:
formula of the reducing
agent:
Inorganic Chemistry
Preparation and Properties of CompoundsA 460.0-mL aliquot of 0.460 M aqueous potassium hydroxide is mixed with 460.0 mL. of 0.460 M aqueous magnesium nitrate.
a Write a balanced chemical equation for any reaction that occurs.
(Use the lowest possible coefficients. Be sure to specify states such as (aq) or (s). If a box is not needed, leave it blank.)
Inorganic Chemistry
Preparation and Properties of CompoundsSodium hydrogen carbonate (NaHCO3), also known as sodium bicarbonate or "baking soda", can be used to relieve acid indigestion. Acid
indigestion is the burning sensation you get in your stomach when it contains too much hydrochloric acid (HCI), which the stomach
secretes to help digest food. Drinking a glass of water containing dissolved NaHCO3 neutralizes excess HCl through this reaction:
HCl(aq) + NaHCO3(aq) -> NaCl(aq) + H₂O(l) + CO₂(g)
The CO₂ gas produced is what makes you burp after drinking the solution.
Suppose the fluid in the stomach of a woman suffering from indigestion can be considered to be 150. mL of a 0.021 M HCl solution. What
mass of NaHCO3 would she need to ingest to neutralize this much HCl ? Round your answer to 2 significant digits.
Inorganic Chemistry
Preparation and Properties of CompoundsThe equation for the reaction of AgNO3
with Cu metal is given below. What mass
of Ag (s) will form from the reaction of
2.51 g of Cu, assuming that the Cu
reacts completely?
2AgNO3(aq) + Cu (s) → Cu(NO3)2 (aq) + 2 Ag (s)
0.466 g
4.26 g
8.52 g
0.739 g
Inorganic Chemistry
Qualitative analysisThe Lewis representation above depicts a reaction between a halogen (blue) and a main-group element from group
electron(s) to complete its octet, and gains these electrons by forming
In this representation, each Y atom needs
atoms of X
There are _ unshared electron pair(s) and
The bonds in the product are
bonding electron pair(s) in the product molecule.
(red).
bond(s) with
Inorganic Chemistry
S Block - Group 1A chemistry student weighs out 0.0825 g of hypobromous acid (HBrO) into a 250. mL volumetric flask and dilutes to the mark with distilled water. He plans to titrate the acid with 0.1500 M NaOH solution.
Calculate the volume of NaOH solution the student will need to add to reach the equivalence point. Round your answer to 3 significant digits.
Inorganic Chemistry
Coordination compoundsDraw the Lewis structure for NF3 in the window below and then answer the question
Do not include overall ion charges or formal charges in your drawing.
What is the electron-pair geometry for N in NF3 ?
What is the the shape (molecular geometry) of NF3?
Inorganic Chemistry
Qualitative analysisWhat is the net ionic equation for the
reaction below?
3 CaCl₂ (aq) + 2 Na3PO4 (aq) ->
Ca3(PO4)2 (s) +6 NaCl (aq)
3 Ca²+ (aq) + 2 PO4³- (aq)
→ Ca3(PO4)2 (s)
PO4³- (aq) + Cl¯ (aq) →
CIPO4- (aq)
Ca²+ (aq) + Na+ (aq) → CaNa (aq)
6 Na+ (aq) + 6 Cl¯ (aq) → 6 NaCl
(aq)
Inorganic Chemistry
Classification of Elements and PeriodicityHow does an increase in reactant
concentration increase the rate of a
chemical reaction?
it does not increase the rate of the
reaction
it increases the frequency of
collisions of reactant molecules
it increases the energy of the
collisions
it provides a new reaction path with
a lower activation energy
Inorganic Chemistry
Qualitative analysisEthylene Glycol (EG) is a common automobile antifreeze. The molar mass of EG is 15pts
62.01g/moles. 651 g of EG is dissolved in 2505 g of water. Calculate-
a. The Freezing point of the solution. Kr= 1.86 °C/m FP water = 0° C
b. The Boiling point of the solution. Km = 0.52° C/m BP water- 100 °C
George makes spaghetti for dinner. He places 4.01 kg of water in a pan and brings it to a
Boil. Before adding pasta, he adds 58 g of table salt (NaCl) to the water and again brings
It to a boil. What is the boiling point of the salt solution? 12 pts
Inorganic Chemistry
Preparation and Properties of Compounds2 K(s) + 2 H2O(1) 2 KOH(aq) + H2(g)
ΔH= ?
When 0.05 mol of K is added to 100 g of water, the temperature of the resulting solution rises from 25.00°C to 35.75°C. If the specific heat of the solution is 4.18 J/(g°C), calculate AH for the reaction.
A. None of these choices is correct
B.-5.41 kJ
C.-180 kJ
D.-360 kJ
E. -90 kJ
Inorganic Chemistry
Coordination compoundsA molecule of Co (CN) 3 (CI)3 exists as both a fac- and mer- isomer which both exhibit unique
properties such as color and melting point.
a. Draw the lewis structures for both the mer- and fac-isomers of Co(CN)3(CI)3 and label.
Additionally identify and label if each structure is either achiral or chiral.
b. Identify the point group of each isomer
Fac=
Mer=
Inorganic Chemistry
Classification of Elements and PeriodicityWhat are the units for heat capacity and specific heat?
Heat capacity: kJ/°C
Specific Heat: kJ/g °C
Heat capacity: kJ/g°C
Specific Heat: kJ/g
Heat capacity: g/kJ
Specific Heat: g°C/kJ
Heat capacity: g°C/kJ
Specific Heat: g/kJ
Inorganic Chemistry
Qualitative analysisYou are given 250 mL solution and need to adjust the drip rate for a patient. Before you begin you notice that the pump dispenses 15 drops per mL. Based on this information, how many drops will the pump dispense per sec if it runs for one hour?
Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer.
1 drop/sec
1.35x10 drops/sec
60,000 drops/sec
0.0046 drops/sec
Inorganic Chemistry
Classification of Elements and PeriodicityA theoretical chemist is inspired by the completion of the periodic table and the naming of element 118, Oganesson (Og). The scientist predicts that there could exist element 119. Complete the following sentences based on the characteristics an element with this atomic number would have.
Predicted element 119 would be classified as
This element would have _ reactivity.
This element's atomic radius would be _ other elements in the same family
This element's ionization energy would be _ other elements in the same family.