Solution

1.

Solutions
Problems

2.

3.

4.

5.

Solution = Solvent + Solute(s)
*Solvent is the component of solution in
the largest amount or that determines
the state of solution.
*Solute is the part of solution dissolved
in a solvent.
*Solutions in which water is the solvent
are called aqueous solutions.

6.

Dilute solutions
Concentrated solutions

7.

Dilute and Concentrated Solutions
• Solutions that contain relatively large amount of
solute are called concentrated, and relatively small
amount of solute are called dilute.
• Dilution is simply adding water to more concentrated
solution to make it dilute.

8.

• If the solubility of NaCl is 36 g NaCl in 100 g water at 20 0C . How
many g NaCl is precipitated when 150 g NaCl is added to 400 g water
at the same temperature?

9.

Calculate the percentages of following
solutions.
• 2 mol NaOH and 120 g water
• 100 g KCl and 300 ml water (dH2O:1 g/ml)
• 100 ml alcohol (d:0.78 g/ml) and 122 g water :

10.

Calculate the mass of solutes in the following
solutuions.
• 500 g of 25 % X solution :
• 400 ml of 25 % X solution (d:2 g/ml)
• 800 g of 80 % NaCl solution :
• 600 ml of 0,5 M Mg(NO3)2 solution:
• 500 g of 0,5 M NaOH solution(d: 1,2g/ml):

11.

• Calculate the volume of H2 at STP released from 400 g of 36,5 % HCl
solution by the following reaction. Mg + 2HCl MgCl2+H2
• (H=1, Cl=35,5)

12.

• 200 g of 40 % solution and 300 g of 40% solution:
• 200g of 40% solution and 200 g of 80 % solution:

13.

• 300 ml of 0,4 M solution and 200 ml of 1,2M solution:
• 400ml of 0,5M solution and 600ml of 1M solution:

14.

• 40g of CaX2 are used to prepare 500mL of 0.4M solutions. What is the
atomic mass of X? (Ca = 40g/mol) (80g/mol)

15.

• There are 2 different solutions which are 20% and 40% NaCl by mass.
How many grams of these solutions have to be mixed to obtain 280 g
of solution that is 32% NaCl by mass?

16.

• If 200 g of a solution that is 10% KNO3 by mass and 600 g of another
solution that is 5% KNO3 by mass are mixed, what is the percent
concentration of KNO3 by mass in the new solution?