Solutions Questions and Answers

29 5 points What volume in mL of 0 414 M HCI is required to neutralize 58 2 mL of 0 301 KOH Answer to 1 decimal place Type your answer

Name Freezing point and boiling point effects Date Block For water only Freezing point depression constant Kr 1 86 C m Boiling point elevation constant Kb 0 512 C m 1 Determine the freezing point and boiling point of a 3 0 molal salt solution NaCl 2 Calculate the freezing point and boiling point of a 4 0 m solution of the non electrolyte glucose C6H12O6 3 Suggest a method for making water boil at 100 0 C in a high altitude area 4 Calculate the freezing point and boiling point of a solution made by dissolving 0 5 moles of table salt NaCl in 500 0 grams of water 5 The non electrolyte methyl alcohol CH OH is frequently used a freezing point depression solvent in cars windshield washer fluid Find the freezing point of a 5 0 m solution 6 What is the freezing point and boiling point of a 2 0 m solution of calcium chloride CaCl 7 Determine the freezing point and boiling point of a solution made by dissolving 171 0 grams of the non electrolyte sucrose C H 2O 1 in 500 0 grams of water

Name Date Block For water only Freezing point depression constant K 1 86 C m Boiling point elevation constant Kb 0 512 C m 1 Determine the freezing point and boiling point of a 3 0 molal salt solution NaCl 2 Calculate the freezing point and boiling point of a 4 0 m solution of the non electrolyte glucose C6H12O6 3 Suggest a method for making water boil at 100 0 C in a high altitude area 4 Calculate the freezing point and boiling point of a solution made by dissolving 0 5 moles of table salt NaCl in 500 0 grams of water 5 The non electrolyte methyl alcohol CH OH is frequently used a freezing point depression solvent in cars windshield washer fuld Find the freezing point of a 5 0 m solution 6 What is the freezing point and boiling point of a 2 0 m solution of calcium chloride Cach 7 Determine the freezing point and boiling point of a solution made by dissolving 171 0 grams of the non electrolyte sucrose C12H22O11 in 500 0 grams of water

The concentration unit molarity describes the amount of solute in grams for 1 mole of solute True False

A concentrated solution has more solvent molecules than the a diluted solution of the same substance True False

15 1 point Solutions are homogeneous mixtures O True O False

1 point A homogeneous mixture exhibits a non uniform composition of two or more types of matter that can be separated by physical change O True False

A precipitation reaction would produce at least one insoluble product True False

How many grams is the mass of 2 60 mol Na SO4 The molar mass of sodium sulfate is 142 04 g mol 369 g 71 0 g 142 g 260 g

If 0 050 mol KBr is dissolved to make 250 mL of solution find KBr 0 013 M 0 20 M 0 050 M 12 5 M

If 200 0 mL of 0 60 M NaCl solution is diluted to 600 0 mL what is the final NaCl O 0 60 M O 0 10 M O 0 40 M 0 20 M

A buffer is made with sodium acetate CH3COONa and acetic acid CH3COOH the K for acetic acid is 1 80 x 10 5 The pH of the buffer is 3 98 What is the ratio of the equilibrium concentration of sodium acetate to that of acetic acid if you assume that the Henderson Hasselbalch equation is accurate O 0 760 0 174 0 840 5 75 Not enough information is given to answer this question

What is the freezing point in degrees Celcius of 3 48 kg of water if it contains 242 6 g of CaBr2 The freezing point depression constant for water is 1 86 C m and the molar mass of CaBr2 is 199 89 g mol

4 You need to make 125 mL of a 9 0 M solution of HCl All you find on the shelves is a 10 5 M solution of HCl What do you do

Ammonia gas reacts with oxygen gas O g to produce nitrogen dioxide and water When 32 4 g of ammonia gas reacts with 87 3 g of oxygen gas to produce 56 4 g of nitrogen dioxide what is the percent yield for the reaction For the hydrogen atom H you must use a molar mass of 1 008 g mol in your calculations and for the nitrogen atom N use a molar mass of 14 01 g mol in your calculations Do NOT include units in your answer Do not include in your answer If you round during your calculation be sure to keep at least three 3 decimal places Report your answer to one 1 decimal place

A certain liquid X has a normal boiling point of 124 50 C and a boiling point elevation constant K 0 60 C kg mol Calculate the boiling point of a solution made of 22 9g of zinc chloride ZnCl dissolved in 300 g of X Round your answer to 4 significant digits 0 P C

12 3 Describe the process of an ionic solute dissolving in water

A solution is prepared by mixing 200 0 g of water H O and 300 0 g of ethanol C H5OH Determine the mole fraction of H O in solution 6 3 0 63 0 37 11 1

Name Colligative Properties Freezing point and boiling point effects Date For water only Block

To make a 4 50 M solution how many moles of solute will be needed if 2 0 liters of solution are required O 2 25 mol solute O 0 44 mol solute O 9 0 mol solute O 4 5 mol solute

If I dilute a solution which of the following change which of the following stay the same a volume of solution b concentration of solution c moles of solute d moles of solvent

2 What happens to a cell when it is placed in a hypotonic solution A hypertonic solution An isotonic solution

3 What type of transport is the sodium potassium pump What does this pump require to function What happens to a cell when it doesn t function

Enter an equation showing how this buffer neutralizes added aqueous base CsOH Express your answer as a chemical equation Identify all of the phases in your answer AEO a xa Xb b b X X NHCl aq CsOH aq NH aq CsCl aq H 0 1 A chemical reaction does not occur for this question uito right Please check your formatting and try again

2 If I need 0 045 moles of AlBr3 for a reaction how many grams should I weigh out on the balance J Brz 206 68 145

Which process would be predicted to have AS 0 A a solid melting B a bond forming C a solution being made D a solid compound decomposing to evolve a 205

What is H3O in a solution with OH 1 0 10 5 M A 1 0 x 10 7 M B 1 0 x 10 9 M C 1 0 x 10 M D 1 0 x 10 14 M B OA D

Suppose that you add 26 5 g of an unknown molecular compound to 0 250 kg of benzene which has a Kf of 5 12 C m With the added solute you find that there is a freezing point depression of 3 29 C compared to pure benzene What is the molar mass in g mol of the unknown compound

5 58 g of an unknown salt KX is dissolved in 100 g of water and the solution has a freezing point of 1 25 C What is the identity of the anion X Given Kf H2O 1 86 oC kg mol

3 Give the concentration in M of each of the following solutions a 2 25 moles of HCl are dissolved in water to make a 1 5 liter solution in quo to mohuloss of babbe ai la obibal mubos d fillim yum wod slo 022 solam of absen himetia a b 2 45 moles of NaOH are dissolved in water to make a 675 milliliter solution WO LKS

30 If 700 mL of sterile water for injection is added to 10 mL of a 10 stock solution what is the ratio strength of the resulting solution

A chemist must prepare 850 0 mL of potassium hydroxide solution with a pH of 13 00 at 25 C He will do this in three steps Fill a 850 0 mL volumetric flask about halfway with distilled water Weigh out a small amount of solid potassium hydroxide and add it to the flask Fill the flask to the mark with distilled water Calculate the mass of potassium hydroxide that the chemist must weigh out in the second step Round your answer to 2 significant digi g

calculate the grams of Fe3O4 when 25 g Fe and 40 g H O are used 3Fe s 4H O 1 Fe3O4 s 4H g Select one O a 28 7 O b 128 5 O c 34 5 O d 69 1

25 2 points A solution in which the pH pOH would be neutral basic O acidic Previous

Find the activity coefficients for both ions of AgCN in a 500 mL solution saturated with AgCN s that also contains 5 055 g of KNO3 Ksp 2 2x10 16 AgCN s KNO3 Ag Y CN Y FM 101 1 0 75 0 755

27 A 1 1000 w v solution is required by a patient On hand in the pharmacy is 20 mL of a 1 250 w v solution How many mL of the 1 1000 w v solution can be made from the stock solution S You mix 500 mL of 7 5 Travasol and 500 mL of 60 dextrose solution and 300 ml of sterile water for injection What are the percentage strengths of the Travasol and dextrose in the mixed solution

9 Using pure water 1 0 M NaCl and 1 0 M CaCl a List the substances in decreasing melting point b List the substances in increasing boiling point

2 Propane gas C3H8 a fuel used in camp stoves soldering torches and specially equipped automobiles reacts with oxygen to produce carbon dioxide water and energy How many moles of CO2 can be produced when 2 25 mol of C3H8 reacts C3H8 5 0 3 CO 4 H O

If 200 mL of sterile water for injection is added to 85 mL of an 80 stock solution what is the percentage strength of the resulting solution If 700 mL of sterile water for injection is added to 10 mL of a 10 stock solution what is the ratio strength of the resulting solution

Examples Label the type of reaction and attempt to predict the products Cq H 0 1 A solution of Calcium oxide combines with water Type of reaction Products C H 2 C5H12 O2 Type of reaction Predict the products 3 Solid Magnesium carbonate decomposes to form solid Magnesium oxide and Carbon dioxide gas Type of reaction Predict the products

6 A 15 g sample of magnesium reacts with hydrochloric acid to form magnesium chloride and hydrogen During the reaction 46 6 g of magnesium chloride was formed What was the percentage yield Ms HCl MgCl H Mg HC MgCl H 0

A child weighs 26 lbs and has an order for Ampicillin 30 mg PO TID The supply is 50 mg 5 ml oral suspension How many mL of PO TID should be given

1 A lawn care provider wishes to mix 10 nitrogen solution and 25 nitrogen solution to get 120 gallons of 16 nitrogen fertilizer Let x gallons of 10 solution and let y gallons of 25 solution a Give the equation that results from the total gallons of mixture b Give the equation that results from the concentration of nitrogen c Find the gallons 10 and 25 solution that needs to be mixed

2 Write net ionic equations for the following molecular equations a HF aq KOH aq KF aq H O 1 h AgNO3 aq NaBr ag A Br s NaNOz aq

Grams dissolved per 100 mL of H O Tools 90 80 70 60 50 40 20 0 0 Solubility of Solutes 20 40 Temperature C 60 80 NaCl 100 Ba NO Ce SO Na HASO Which of the following substances would be the LEAST saturated at 70 C and 38 g dissolved in 100 g of water

Calculate the molality of a solution formed by adding 4 50 g NH4Cl to 13 9 g of water

Suppose a mixture containing 2 33 g H and 31 4 g NO has a total pressure of 3 33 atm What are the partial pressures of both gases in the mixture PH i atm

a What is the molarity of a 1600 mL solution containing 3 2 moles of dissolved KBr Show all of your work and include units and correct number of significant figures on your answer b How many grams of Sodium hydroxide are needed to make 250 mL of 3M solution Show all of your work and include units and correct number of significant figures on your answer

If you want to make 200 mL of solution with 0 1 25 molar of NaCl

1 A liquid liquid 1 with 5 mol of sugar per 20 liters is poured into another liquid The final volume of the combined liquids is 35 liters and the final molarity is 0 09M What was the volume of liquid 1 2 To what volume will you have to dilute 30 0 mL of a 12 M HCI solution to make a 0 35 M HCI solution 3 How many grams of calcium chloride will be needed to make 750 mL of a 0 100 M CaCl solution CaCl molar mass 111 g mol