1) What volume of water would you add to 15.0 mL of 12 M HCl to make it to 6 M s

Question

1) What volume of water would you add to 15.0 mL of 12 M HCl to make it to 6 M solution?

2)To prepare 0.20 M NaOH (40.0 g/mol) you will need to dilute 34 g of NaOH to ____ mL.

3)The number of grams of KF in 45.0 ml of 0.200 M KF

4)To prepare 500.00 mL of a solution that is 0.350 M in HCl, how many mL of 3.00 M HCl needs to be added to a 500 mL volumetric flask and completely fill with water to the mark.

5)Which of following reactions contain(s) mostly reactants at equilibrium:

6)At equilibrium, the reaction below has an equilibrium constant (Kc) of 4.2 x 10-2 and concentrations of products at equilibrium are: [PCl3] = 0.10 M and [Cl2] = 0.10 M. What is equilibrium concentration of PCl5?

Explanation / Answer

1) What volume of water would you add to 15.0 mL of 12 M HCl to make it to 6 M solution?

Answer: Use M1V1 = M2V2

M1 = 12M

V1 = 15 mL

M2 = 6M

V2 ?

So, 12M x 15mL = 6M x V2

V2 = 30mL

So, total volume of 6M= 30mL

so, volume of water added = 30mL - 15mL = 15mL

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