Dilution means adding water to something so that the ratio of solute to solvent is less than in the original solution. Some people say, “Dilution is the solution to pollution.” Do you think this statement true? Could you ever add enough water so that there would be no drink mix—that the water would be the same as in cup #6, pure water? Do you think you could you ever add enough water to a pollutant to make it disappear completely? Why or why not?

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

A solution containing 78 g of NaNO3 in 70. g H2O at 50 ° C is cooled to 20 °C. Use the solubility data from the table below. Part A Solubility (g/100. g H2O) Substance 20 °C 50 °C How many grams of NaNO3 remain in solution at 20 °C? KCI 34 43 Express your answer in grams to two significant figures. NaNO3 88 110 ? C12 H22O11 (sugar) 204 260

The concentration of a stock solution of potassium dichromate is 0.50 mol/L. If you were to take 200 mL of this dilution and add 200 mL of water to get a total volume of 400 mL, what do you predict the concentration of the diluted solution would be ?

Complete and balance the following neutralization reactions. H2CO3(aq)+Ba(OH)2(aq)→H2CO3(aq)+Ba(OH)2(aq)→ Express your answer as a chemical equation. Identify all of the phases in your answer.

Magic Acid® is the commercial name for a 1:1 mixture of fluorosulfonic acid, HSO3F, and antimony pentafluoride, SbF5, that generates H2SO3F+ cations – this last species qualifies as a superacid. Can Magic Acid® be diluted in water and retain its superacid property? Justify your answer and include at least one chemical equation.

Toxic Cr(VI) can be precipitated from an aqueous solution by bubbling SO2 through the solution. How much SO2 is required to treat 3.00 × 108 L of 4.50×10-2 mM Cr(VI)?

1. (answer the questions in the tan boxes in the tables below each question) A student conducted an investigation to determine the effect of water temperature on the amount of sugar that dissolves in a beaker of water. Identify components for trial 1 of this investigation. Beaker Number 1 2 3 4 Amount of Water (mL) 100 100 100 100 Amount of Water (mL) Trial 1 Temperature of Temperature of Amount of Sugar Sugar (°C) Water (°C) Dissolved (g) 20 20 20 20 Temperature of Sugar 5 10 15 20 185 189 194 204 Temperature of Water Terms Variable Constant Amount of Sugar Dissolved

4) Write a chemical equation describing the dissolution of Ba(NO3)2 in water. To give you an example of what I'm looking for, for NaBr, the equation would be NaBr(s) → Na*(aq) + Br- (aq). 5) Based on your equation from question 4, if 41.9 g of Ba(NO3)2 are dissolved in water to produce a total solution volume of 495 mL, determine the molarity of NO3- in the solution?

1. The average salt content of seawater is equivalent to 0.599 M NaCl (density = 1.023 g/mL). What is the concentration in units of ppm? (Note that the density is not 1 g/mL.) PpM: mg so fu fe Fg soln O.599 nol Nl ST.49 Nell IL soln Imol 1.013g 2. Describe how you would make a 0.425 m KNO3 solution. (KNO3 is a solid.) How many grams of H3PO4 would be in 250.0 mL of a 2.155 N H3PO4 Solution?