Size 1 paper; 40 pts Group project members Group Seatwork Size 1 paper; 40 pts Group project members

1. Wastewater from a cement factory contains 0. 25 g Ca2+ and 0 1. Wastewater from a cement factory contains 0.25 g Ca2+ and 0.056 g Mg2+ per 50.0 L of solution (ρ=1.05 g/mL). (20 pts) Express the concentrations of Ca2+ and Mg2+ in (a) ppm by mass (b) molarity. (c) How many Ca2+ and Mg2+ ions are present in the sample? 2. The label on a 750.-mL bottle of Italian chianti indicates 11.5% alcohol by volume. (10 pts) (a) How many liters of alcohol does the wine contain? (b) Calculate the number of San Miguel Light (5.00 % alcohol, 330.-mL per can) containing an equal amount of alcohol. 3. How would you prepare the following solutions? (10 pts) 2.5 L of 0.65 M NaCl from table salt 15.5 L of 0.3 M urea from 2.1 M urea

1. Wastewater from a cement factory contains 0. 25 g Ca2+ and 0 1. Wastewater from a cement factory contains 0.25 g Ca2+ and 0.056 g Mg2+ per 50.0 L of solution (ρ=1.001 g/mL). (a) 4.8 ppm Ca2+ and 1.1 ppm Mg2+ (b) 1.2 x 10-4 M Ca2+ and 4.6 x 10-5 M Mg2+ (c) 3.8 x 1021 Ca2+ ions and 1.4 x 1021 Mg2+ ions 2. The label on a 0.750-L bottle of Italian chianti indicates 11.5% alcohol by volume. (a) 0.0862 L alcohol (b) 5.22 cans 3. (a) Add 95 g NaCl to enough water to make 2.5 L of aqueous solution. (b) Add 2 L of 2.1 M urea to enough water to make 15.5 L of solution.