Solubility facts

Question 1

Is magnesium sulphate soluble in water?

Answer 1

magnesium sulphate is soluble

Question 2

Is calcium sulphate soluble in water?

Answer 2

calcium sulphate is sparingly soluble

Question 3

Is strontium sulphate soluble in water?

Answer 3

No, strontium sulphate is insoluble

Question 4

Is barium sulphate soluble in water?

Answer 4

No, barium sulphate is insoluble

Question 5

What is stronger, the attraction of a Sr ion to a sulphate ion or a water molecule?

Answer 5

Attraction to the sulphate ion, that’s why it doesn’t dissolve.

Question 6

If you add sulphuric acid to magnesium chloride solution, what would you see?

Answer 6

No change, the magnesium, chloride and sulphate ions all stay in solution

Question 7

If you add sulphuric acid to barium chloride solution, what would you see?

Answer 7

Solid white barium sulphate would precipitate out.

Question 8

If you add sulphuric acid to calcium hydroxide solution, what occurs?

Answer 8

A neutralisation reaction, forming calcium sulphate which may precipitate out.

Question 9

What is the trend in solubility of group 2 hydroxides?

Answer 9

It increases as you go down the group (opposite to sulphates)

Question 10

Is calcium hydroxide soluble in water?

Answer 10

Sparingly, but enough to make ‘lime water’ solution.

Question 11

Is barium hydroxide soluble in water?

Answer 11

barium hydroxide is soluble

Question 12

If you add sodium hydroxide solution to a solution of magnesium nitrate, what do you see?

Answer 12

A precipitate of white magnesium hydroxide forms.