3.4.4 - Acid + Base Reaction

Question 1

Acid + base equation :

Answer 1

Acid + base ➡️ 🧂 salt + water 💧

Question 2

What are the important observations made in an acid + base reaction !?

Answer 2

. The base disappears
(because it is used up in the reaction)

Question 3

How do you make salt crystals?

Answer 3

. We can use an acid + base reaction

Question 4

Step one (Making salt crystals):

Answer 4

. Add excess base to hot acid
( makes the salt solution quickly and ensures all the acid is used up)

Question 5

Step two (making salt crystals):

Answer 5

. Filter out the excess base
(The salt solution is the filtrate and is collected in an evaporating basin)

Question 6

Step three (making salt crystals) :

Answer 6

. Heat the salt solution until crystals start to form around the edges.
(this saturates the solution so that the crystals form most efficiently)

Question 7

Step four (making salt crystals) :

Answer 7

Leave the salt solution to crystallise.
(evaporation of water allows crystals to form)