1 ) A 2.0 mol/L solution of potassium hydroxide KOH, is used to precipitate toxic metal ions from industrial waste. What mass of potassium hydroxide is required to prepare 1.5L of this solution?

2) To prepare a 250mL of a 0.40mol/L sodium chloride solution using an available 1.5 mol/L solution, how much of the 1.5 mol/L stock solution and how much water do you need to add?

Question 3 options:

	66.7mL stock solution, 183.3mL water
	140.5mL stock solution, 109.5mL water
	50mL stock solution, 200mL water
	125mL stock solution, 125mL water

3) Silver Nitrate, AgNO₃ , solutions are sometimes used to determine the salt concentration of food. What is the amount concentration of 500.0mL of a solution that contains 34.0g of silver nitrate?

Question 1 options:

	0.75 mol/L
	0.068mol/L
	50mol/ L
	0.40 mol/L