Percentage Concentration

What is the percent composition of a sugar solution where 10 grams of sugar is added to 100 grams of water? (round off your answer to the nearest tenth)

• .10%

• 0.091%

• 9.090909%

• 9.1%

Calculate the mass percent of solution, if there is 100 g of sugar and 400 g of water

• 30

• 25

• 20

• 15

What mass of solute is needed to make 75.0 g of a 3.4% solution?

• 2.55 g
• 22 g
• 0.05 g

What is the concentration, in percent by volume, of 15.3 mL of solute in 2.65 L of solution?

• 0.58%
• 0.0058%
• 5.8%

If you want to prepare a 200 mL aqueous solution of MgO which is 20% by mass magnesium oxide, how many grams of magnesium oxide would be needed?

• 40 grams

• 50 grams

• 30 grams

• 20 grams

The percentage composition of a solution can be:

• mass/mass

• mass/volume

• volume/volume

A solution contains 15g Na2CO3 and 235g of water. What is the mass % of the solution?

• 15%m/m

• 6.4% m/m

• 6.0% m/v

• 6.0% m/m

A solution that is 0.85% m/v, is equal to the following conversion factors:

• 0.85g/0.85ml

• 0.85ml/100g

• 0.85g/100ml

• 100ml/0.85g

How many mililiters (mL) of 5% m/v glucose solution are given to a patient that receives 150g of glucose?

• 30 mL

• 3000mL

• 7500mL

percentage Concentration describes:

• amount of solute dissolved in 1 part of solution

• amount of solute dissolved in 1000 parts of solution

• amount of solute dissolved in 100 parts of solution

• amount of solute dissolved in 10 parts of solution