Chemical Bonding Questions and Answers

Name the following acid H3PO4 Ohydrophosphoric acid Ophosphoric acid phosphorous acid hydrogen phosphate

What is the VSEPR shape of a water molecule O Trigonal Bipyramidal Bent Linear Tetrahedral

Predict and balance the following reaction Cu3 PO4 2 Fe OH 3 Cu3 PO4 2 2Fe OH 3 FeCu3 PO4 2 OH 3 Cu3 PO4 2 2Fe OH 3 2FePO4 3Cu OH 2 Cu3 PO4 2 Fe OH 3 FePO4 Cu OH 2 Cu3 PO4 2 2Fe OH 3 2Fe PO4 3 3Cu OH 3

Question 19 Which of the following best describes the interaction between water molecules Hydrogen Bonding Van der Waals Forces O London Dispersion Forces Dipole Dipole Forces

1 Neutralize 2 Neutral 3 Acid rain 4 Acid 5 Base 1 Alpha Particle 2 Gamma Ray 3 Beta Particle F Radioactiv e Uranium Solution Alloy a When pollution causes rain to be acidic pH of less than 5 6 b To mix acids and bases to cancel each other out and make salt and water Equal number of H and OH ions water is an example A compound that adds OH ions to water A compound that adds H ions to water The largest natural element Fuel for fission reactors b Can be stopped by wood occurs when a neutron breaks into a proton and electron An atom that emits energy or a particle A helium nucleus 2 protons and 2 neutrons low in energy Powerful radiation that can cause biological damage takes many feet of concrete to stop When a substance cannot be dissolved into a solution A mixture of two metals C d e a C b d e a Chemistry Vocabulary Matching 1 Weak acid 2 pH 3 Strong Acid 4 Salt Water 5 Weak Base 1 Chain reaction 2 Fission 3 Fusion 4 Half life 5 Carbon Dating a The measure of acids and bases b The product of a neutralization C d A compound that adds a lot of H ions to water e a Combining smaller atoms into larger atoms b Splitting large atoms into smaller ones Toxic by products When one fission causes another and another etc C reaction between an acid and a base compound that adds a few H ions to water e d Using the known decay of an isotope to determine the age of objects The time necessary for 50 of a radioactive sample to decay a A compound that adds a few OH ions to water 1 Supersaturated b b When a solution can hold more solute When a solution can t hold more solute

Identify the type of compound that would have the following properties Conducts electricity when melted or dissolved in water High Melting Point Usually a Solid lonic Metallic Molecular Covalent

s the intermolecular attractive forces between molecules increase in magnitude do you expect ach of the following to increase or decrease in magnitude Part A Vapor pressure increase decrease Submit Part B Heat of vaporization increase Request Answer decrease Submit Part C Boiling point Request Answer increase

Hybridizing s p p atomic orbitals forms three hybrid orbitals called sp2 orbitals Predict the number of orbitals formed by hybridizing s p p p d i e hybridize one s three p and one d orbital What are the hybrid orbital s called Write the name of the hybrid without capitals or superscripts ex sp2 What is the hybridization of oxygen in a molecule consisting of one atom of oxygen and two atoms of Cl Write the name of the hybrid without capitals or superscripts ex sp2

Consider a cation with a 1 charge consisting of one atom of chlorine and two atoms of fluorine What is the electron domain geometry watch out for spelling molecular geometry watch out for spelling hybridization around the central atom is it polar yes or no

a Assign the correct quantum numbers n l ml to the d electron in the valence shell of scandium Sc Z 21

A 5 B 4 O E C 12 D 6 E 8 corresponding Lewis structure Ay and then ar the Click to draw a new structure 62 F Sunny

What is the hybridization of the central atom in a molecule consisting of one atom of carbon and two atoms of sulfur Write the name of the hybrid without capi or superscripts ex sp2 What is the bond angle Just write the number and not the degree symbol

What is the ground state electron configuration for the phosphide ion P A Ne 3s B Ne 3s 3p C Ne 3p D Ne 3s 3p6

Choose the correct Lewis structure for SCI A O B O C O D O CLCI Crci CI S C CICI CLCI S C ci CC S Select one answer 6 points

Draw the Lewis structure of acetonitrile CH3CN and then choose the appropriate pair of molecular geometries of the two central atoms Your answer choice is independent of the orientation of your drawn structure Click to draw a new structure A tetrahedral linear B trigonal planar bent 120 C trigonal trigonal pyramidal D planar tetrahedral E linear pyramidal

Match the type of bond to the illustration 8 x Fill in the blanks by select one option from each men ab Part 1 5 points ab Part 2 5 points ab Part 3 5 points ab Part 4 5 points 20 points

2 points The chemical structure of diatomic nitrogen is NEN What type of bonds are between the two N atoms 3 sigma boinds 1 sigma bond and 2 pi bonds 2 sigma binds and 1 pi bond

2 2 points In Molecular Orbital Theory the side by side overlap of two p orbitals creating two lobes of electron density one above and one below the nodal plane is the m bonding orbital True False Next

26 5 points Match each each of the hybrid orbitals to the correct shapes sp d sp sp

32 3 points Use MO theory to arrange the following species in order of increasing bond length a F b F2 c F shortest 1 2 3 b c

non polar If polar identify the direction of the dipole moment 0034 11 12 14 14 14 14 21 28 30 View Electronegativities C C Based on the electronegativity values this bond is 14 1 4 Ta

1a Draw the structure of S2 2a Draw the structure of NC13 3a Draw the structure of CO2 4a Draw the structure of HBr 5a Draw the structure of P2 6a Draw the structure of CH3OCH3 7a Draw the structure of C2H2 8a Draw the structure of CO 9a Draw the structure of SO3 10a Draw the structure of 03 1b How many single double and triple bonds are there 2b How many single double and triple bonds are there 3b How many single double and triple bonds are there 4b How many single double and triple bonds are there 5b How many single double and triple bonds are there 6b How many single double and triple bonds are there 7b How many single double and triple bonds are there 8b How many single double and triple bonds are there 9b How many single double and triple bonds are there 10b How many single double and triple bonds are

8 Determine the shape of a Sil4 molecule Give its bond angle and draw a picture of it Make sure to include the type of shape this molecule has

Give the names of the following ions a NO b 0 c ClO3 d CO3 e SO3

8 Rank the following compounds in order of expected boiling point from least to greatest CaBr2 NaN MgF2 MgO AlCl3 and Na2S 3 pts

5 The MO diagram for N2 is below Use this diagram to calculate the bond order for N 4 pts 2p 21 2p unn Energy

Draw the Lewis structure of the hypochlorite ion CIO Include lone pairs Select O Draw CL Rings More

Below is the Lewis structure of the hydrogen cyanide HCN molecule H C N Count the number of bonding pairs and the number of lone pairs around the carbon atom in this molecul bonding pairs lone pairs X

Draw the Lewis dot diagram for a neutral atom of Ca C U

5 When 6 0 grams of zinc are dropped into excess hydrochloric acid how many grams of zinc chloride will be produced 6 After 7 9 grams of sodium are dropped into a bathtub full of water how many grams of hydrogen gas are released

Which of the following molecules is polar 1 BCIF2 2 BF3 3 Nhat 4 NO 3 5 C H 02 0 3 05 1

c NaOH aq NH4Br aq NaBr aq NH3 g H2O D

Part 2 Thermochemical Stoichiometry Show your work for all problems 4 pts each 16 pts total 7 How much heat will be absorbed when 13 7 g of nitrogen reacts with excess O according to the following equation Circle one Is this reaction endothermic or exothermic Additionally rewrite the thermochemical equation in the other format I N O 2NO AH 180 kJ 8 What mass of propane C3H8 must be burned in order to produce 76 000 kJ of energy Circle one Is this reaction endothermic or exothermic

Identify the oxidizing and reducing agents in the skeletal unbalanced reaction Then balance the reaction including the phase solid liquid etc of each species The reaction takes place in basic aqueous solution CI O g H O aq CIO aq O g oxidizing agent reducing agent balanced equation Identify the oxidizing and reducing agents in the skeletal unbalanced reaction Then balance the reaction including the phase solid liquid etc of each species The reaction takes place in basic aqueous solution N H g CIO aq NO g Cl aq oxidizing agent reducing agent

the balanced ch equation that escri dissociation of lead II phosphate into ions when dissolved in water Identify the compound s formula and the ions and their coefficients on the product side of the equation Tap on each field to select formulas and coefficients s aq aq

10 2 points One mole of O3 contains more atoms than one mole of O True False Previous

1 Using solubility rules decide whether the following ionic solids are soluble or insoluble in water a AgBr d Na2CO3 b PbCl2 e NH4 2SO4 c SrSO4 f Ca NO3 2

F 4 33 34 35 36 37 38 39 40 11 38 2 points The term molecule is only used to describe covalent substances True False Previous

Imagine a molecule MX2 in which both X atoms are bonded to M and M also has 3 lone electron pairs on it What is the electron domain geometry Be careful of spelling Is this molecule polar

9 2 points The formula of the oxyacid containing the arsenate ion is H3ASO4 HASO4 H3 AsO 3 HASO3 O O Previous

What is a BOND a Interaction between atoms in a molecule b Interactions between any two particles c Electrostatic interactions between atons d Interactions between a molecule and an atom

Consider a molecule with four single bonds and two lone electron pairs attached to the center atom What is the number of electron domains What is the molecular geometry

What is the hybridization around the central atom in NO

What are the pair of dots on the final bonding structure called a Pair b Happy c Shared d Lone

Asealed bottle of water is an example of The answer depends on the temperature of the system a closed system an isolated system an open system

Ionic bonding occurs when a metal transfers one or more electrons to a nonmetal in an effort to attain a stable octet of electrons For example the transfer of an electron from sodium to chlorine can be depicted by a Lewis dot diagram Na Na Cl Calcium would need two chlorine atoms to get rid of its two valence electrons C Ca C Ca Cl Sketch the transfer of electrons in each combination 1 K F 2 Mg I 3 Be S 4 Na O

A O sp B O sp C O sp D O sp d E O sp d Question 5 BrF A O sp B O sp C O sp D O sp d F Osn342 Se 10 Selec 10 pc

Given the unbalanced reaction equation NH3 g O2 g N g H O g Use bond energies to calculate the enthalpy change for this reaction in kJ kJ Type numbers in the box 10 points

the molecules have net dipole moments are polar Il that apply 2 TA

Two possible structures for the molecule HCN are shown below H N C Structure 1 Determine the formal charge for each atom in each structure Then answer the following questions H C N Structure 2 In Structure 1 the formal charge on C is In Structure 2 the formal charge on C is On the basis of formal charge the better structure is Vand the formal charge on Nis and the formal charge on N is V 1 1 Fill in the blanks by selecting one option from each menu ab Part 1 2 points aby Part 2 2 points ab Part 3 2 points ab Part 4 2 points ab Part 5 4 points 12 points