With work shown. Solutions and Concentrations. 1) What masses of KCL and H20 are

Question

With work shown. Solutions and Concentrations.

1) What masses of KCL and H20 are needed to make 250 g of 5.00% solution?

2) How many grams of KOH are required to prepare 500 mL of 0.450 M KOH solution?

3) Calculate the molarity of a solution prepared by diluting 125 mL of 0.400 M K2Cr2O7 with 875 mL of water?

4) What is the molarity of a solution prepared by dissolving 150.0g C6H12O6 in 600.0 g of H20?
5)How many grams of hydrogen chloride are in 50 mL of 11 M HCl solution?

6) A 50.0 mL sample of HCl required 25.81 mL of 0.1250 M KOH for neutralization. What is the molarity of the acid? (Write a balanced chemical equation first).

7) How many milliliters of 2.00 M H2SO4 will react with 28.0 g of NaOH?

Explanation / Answer

1. 5% solution of KCl in H2O means 5g KCl dissolve in 95g water to form 100g solution.

For 250g solution

Mass of KCl=250×5/100=12.5 g

Mass of H2O=250-12.5=237.5g

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