Preparing solutions

Question 1

standard solution

Answer 1

A solution with a known concentration

Question 2

There are two methods used to prepare aqueous solutions:

Answer 2

1) Dissolving a measured mass of pure solute in a certain volume of solution

2) Diluting a solution of known concentration

Question 3

Before you start

Answer 3

determine the volume and concentration of the solution

to solve for moles (n = v x c)

solve for mass of solute (m = n x M)

Weigh this mass, and add it to the predetermined volume of water

Question 4

Starting With a Concentrated Solution

Answer 4

For dilution word problems, use the C1V1 = C2V2 formula

Question 5

C1 and V1 are

Answer 5

initial volumes and concentrations

Question 6

C2 and V2 are

Answer 6

final volumes and concentrations

Question 7

When you are diluting a fully concentrated acid,

Answer 7

you will always solve for V1, the amount of fully concentrated acid needed for your new solution

Question 8

ALWAYS ADD

Answer 8

ACID TO WATER

This mixing is a very exothermic reaction (you will feel the beaker getting warmer), and adding water to the top of acid may cause it to boil instantly, splashing corrosive acid all over your million dollar hands!