29 g of KOH is dissolved in 250. mL of water. What is the mass percent of KOH in this solution? (use the density of water 1.00g/mL) What is the concentration, expressed in molal (m), of this initial solution? What is the concentration, expressed in molar (M), of this initial solution? (assume that the addition of the KOH to the water did not change the volume, which is still 250.mL)

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29 g of KOH is dissolved in 250. mL of water.

  1. What is the mass percent of KOH in this solution? (use the density of water 1.00g/mL)
  2. What is the concentration, expressed in molal (m), of this initial solution?
  3. What is the concentration, expressed in molar (M), of this initial solution? (assume that the addition of the KOH to the water did not change the volume, which is still 250.mL)
  4. If I add 500.mL of pure water to this 250.mL solution, what is the new concentration expressed in molar (M)?
  5. If, instead, I took the 250. mL solution and evaporated the water until the solution had a volume of 150.mL, what would be the concentration of this this new solution expressed in molar (M)?
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