1- List the solutions and the % mass of the solute in solution. 2- A bottle of r

Question

1- List the solutions and the % mass of the solute in solution.

2- A bottle of regular pepsi states the following on its lebal:

Serving size: 8 fluid ounces ( about 240 mL )

Total carbohydrates ( all as sugar ): 27 g calculate to nearest gram the number of grams of sugar you will consume if you drink a 20 ounce bottle of Pepsi. And if a teaspoon of sugar is approximately 4 gram, how many teaspoons of sugar would you have consumed from this bottle of Pepsi ?

3- A 4 g sugar cube (Sucrose C12H22O11) is dissolved in a 350 ml teacup of 80 C degree of water. What is the percent composition by mass of the sugar solution?

4- What amount of NaCl would be needed to make a 500 mL of a 35% saline solution ?

Explanation / Answer

1. Solution is defined as a single phase or homogeneous mixture of a solute or solutes in a solution.

% mass of the solute is defined as = (mass of solute / mass of solute + solvent) x 100

2. Total volume as noted = 240 mL = 8 ounce

Total carbohydrate or sugar = 27 g in 240 mL

If you drink 20 ounce (20 x 30) mL bottle of pepsi then,

amount of sugar consumed would be = 600 x 27 / 240 = 67.5 g

a teaspoon of sugar = 4 g

So, number of teaspoon of sugar consumed by 20 ounce bottle pepsi = 67.5/4 = 17 teaspoon

3. 4 g sugar dissolved in 350 mL of water (density of water = 1g/mL)

% composition by mass = [4/(350+4)] x 100 = 1.13 % mass of sugar solution

4. To make a 35% saline solution

Total volume of solution = 500 mL

density of water = 1 g/mL

So, 500 mL = 500 g

35/100 = g of NaCl / 500

g of NaCl required = 175 g

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