Macromolecules/Solution-Making Pre-Lab

You’ve purchased a 12 ounce can of frozen orange juice concentrate at Kroger. The instructions tell you to mix the contents of the can (the frozen OJ) with 36 ounces of water (roughly 3 cans of water). Name the solvent in this scenario.

• the juice and water mixed together

• the juice concentrate

• the water

• the pulp

On average, sea water contains 33.0 g of sodium chloride (NaCl) per liter. Calculate the molarity of NaCl in sea water. MW= 58.452 g/mol

• 5.650 M

• 58.44 M

• 0.565 M

• 33.00 M

A 20% KCl solution should contain ___ grams of KCl in ___ milliliters of water

• 20 grams; 100 mililiters

• 200 grams; 1000 milliliters

• 10 grams; 50 milliliters

• all of the above

How many grams are in a 500 mL solution of 10% NaCl?

• 50 g

• 500 g

• 5 g

• 10 g

How many moles of Na2CO3 are there in 15.0 mL of a 5.00 M solution?

• 0.750 moles

• 0.075 moles

• 7.500 moles

• 0.0075 moles

What is the molarity of 7.00 g of sodium hydroxide (NaOH) in a 750.0 mL solution? MW of NaOH = 40 g/mol

• 0.175 M

• 39.99 M

• 0.023 M

• 0.233 M

You perform a dilution by combining 100.0 mL volume of CaCl2 with 700.0 mL water. What is the dilution factor?

• 1:7

• 7:1

• 1:8

• 1:6

A 20.0 % NaCl solution is equivalent to mixing ________ of NaCl in 100.0 mL of water

• 2.00 grams

• 20.0 grams

• 200.0 grams

• 0.200 grams

Given a 35% solution of NaCl how many mL of this solution would be used to prepare 750.0 mL of a 14% NaCl solution?

• 300 mL

• 30 mL

• 3000 mL

• 1000 mL

A 10.0 mL sample of a 10.80 M NaCl solution is diluted to a final volume of 650.0 mL. What is the molarity of the final solution?

• 166.0 M

• 0.016 M

• 702.0 M

• 0.166 M