5. The following graph is a calibration curve for the density of an aqueous salt solution versus percent salt concentration. If the density of seawater is 1.025 g/mL, what is the percent salt concentration? 1.20 1.15 1.10 1.05 1.00 0.95 0 5 15 10 Percent Salt 20 25

A sample of water is found to contain 0.012 ppm of Pb2* ions. Calculate the mass of lead ions per liter of this solution (assume the density of the water solution is 1.0 g/mL). O 5.9x10 g/L Pb2 O 1.2*10 g/L Pb O 1.2*10 11 g/L Pb2 O 1.2%10 5 g/L Pb2+ Activate Windows Go to Settings to activate Windo inspiron F10 F11 Backspac P F K Ente B Shift Alt Alt Ctrl

Use the solubility curve below to answer the following questions: 150 140 130 120 110 100 NANO3 90 80 70 60 NH&Cl KCI NaCi 50 40 30 20 KCIO3 10 Ce2(SOals O 10 20 30 40 50 60 70 80 90 100 Temperature (c) Q1) As the temperature increases, the solubility of the NH3 in water Q2) The solute, NH3, is MOST likely a (increases/decreases/stays the same). (solid, liquid, or gas). Q3) How many grams of NH4CI are dissolved in 500 g of water at 90 °C? Q4) If you had 50 grams of NH4CI in 100 g of water at 40 °C, would the solution be saturated, unsaturated, or supersaturated? Q5) You heat a solution of KCIO3 to 80°C and saturate the solution. You then allow the solution to cool down to 50°C. How many grams of solute would precipitate out of the solution? NH3 per 100 g H,0 Grams of solute ONO CON

Part1: 1.05×10-1  m glucose solution made by dissolving the glucose in 100.0 kg of water: ____ mol  Part2: 2.35×10-2  m Na2CrO4 solution made by dissolving the Na2CrO4 in 1000.0 g of water:____ mol