Question #237518

5. How many milliliters of a 2.0 M CuSO4 solution are needed to prepare 0.250 L of

0.400 M CuSO_4?

6. What is the molarity of a solution in which 111 g sodium hydrogen carbonate is

dissolved in a 20.0 L solution?

7. A solution of hydrogen peroxide is 13.7% by mass. What is the molarity of the

solution? Assume that the solution has a density of 1.01 g/mL.

8. A solution is prepared by dissolving 19.2 g of glucose in 205 g of water. The final

volume of the solution is 214 ml. Find the concentration of the solution in units of

molality.

0.400 M CuSO_4?

6. What is the molarity of a solution in which 111 g sodium hydrogen carbonate is

dissolved in a 20.0 L solution?

7. A solution of hydrogen peroxide is 13.7% by mass. What is the molarity of the

solution? Assume that the solution has a density of 1.01 g/mL.

8. A solution is prepared by dissolving 19.2 g of glucose in 205 g of water. The final

volume of the solution is 214 ml. Find the concentration of the solution in units of

molality.

Expert's answer

250 ml Ã— 0.4 = 100ml

= 100/2 = 50ml

Molar mass of sodium hydrogen carbonate = 84.007

Molarity = 111/84.007 = 1.32 mol

1.32/20

= 0.066mol/L

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