1. calculate the percent concentration (mass/mass) of 14 grams of sugar dissolved in 986 grams of water. (remember to add the sugar and water masses together).

2. an industrial plant is discharging 50,000 ppm cuso4 into a waste stream. the us epa will allow a maximum discharge of 500 ppm cuso4. how many times would the discharge have to be diluted to meet epa standards?

3. a 20 oz pepsi label reads as follows: serving size 8 fl oz (240 ml), sugars = 27 g per serving. what is the percentage (m/v) of sugars in pepsi?

4. calculate the molarity when 6.12 g c6h12o6 is dissolved to make 50.0 ml solution. round to two significant digits.

5. how many grams of solute in grams are needed to make 2.50 l of 0.250 m (nh4)2co3.

6. how many grams of sodium chloride are needed to make 750 g of .90% sodium chloride (by mass/mass)

7. to pass an emissions test, your car cannot emit more than 1,000 ppm carbon monoxide (co). your car produced 3.2 grams of co in 67.2 liters of exhaust. show the calculations necessary to decide if your car passed or failed the emissions test. (note: 22.4 liters of air/mole and 31 grams/mole of air). enter you emission number in ppm.

8. you want to make a 0.5% (vol/vol) solution of bleach to sanitize your toilet. how many ml of bleach are needed to make 4 l of cleaning solution?

9. a solution contains 100 g of methanol (ch3oh) in water to make 1700 ml of solution. calculate the molarity of the solution.

10. to what volume should 5.0 ml of an 2.0 m citric acid solution be diluted in order to obtain a final solution that is 1.50 m?