The salt called potassium chloride is made when potassium hydroxide solution reacts with hydrochloric acid. Describe a method for making crystals of potassium chloride from potassium hydroxide solution and hydrochloric acid. In this method you should: • describe how you will add the correct amount of the hydrochloric acid to neutralise the potassium hydroxide solution • describe how you will get crystals of potassium chloride

The correct answer to the question is

Potassium hydroxide and barium chloride react, potassium chloride and barium hydroxide.

The equation for the reaction can be written as follow:

Potassium hydroxide => KOH

Barium chloride => BaCl₂

Potassium chloride => KCl

Barium hydroxide => Ba(OH)₂

Potassium hydroxide + Barium chloride —> Potassium chloride + Barium hydroxide

The above equation can be balance as follow:

KOH + BaCl₂ —> KCl + Ba(OH)₂

There are 2 atoms of Cl on the left side and 1 atom on the right. It can be balance by writing 2 before KCl as shown below:

KOH + BaCl₂ —> 2KCl + Ba(OH)₂

There are 2 atoms of K on the right side and 1 atom on the left side. It can be balance by writing 2 before KOH as shown below:

2KOH + BaCl₂ —> 2KCl + Ba(OH)₂

Now, the equation is balanced.

Option C. 2KOH + BaCl₂ —> 2KCl + Ba(OH)₂ gives the correct answer to the question.

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