3.5.4 - Acid + Metal Reaction

Question 1

Acid + metal equation

Answer 1

Acid + metal ➡️ salt 🧂+ hydrogen

Question 2

When is a salt formed !?

Answer 2

. A salt is a compound formed when H is displaced from an acid

Question 3

What are the two important observations made in an Acid + metal reaction

Answer 3

. The metal disappears
(used up)

. There is fizzing
(hydrogen gas is produced)

Question 4

What are the three metals less reactive than hydrogen!?

Answer 4

. Au ➡️Ag ➡️Cu

Question 5

Why can’t we use the less reactive metals in an acid + metal reaction !?

Answer 5

. They are less reactive than hydrogen so they can’t displace it.

Question 6

What are the middle reactive metals !?

Answer 6

. Pb ➡️Fe ➡️Zn➡️C➡️Al ➡️Mg➡️Ca

Question 7

What are the three most reactive metals !?

Answer 7

. Li ➡️ Na ➡️ K

Question 8

Why don’t we use the three most reactive metals in an acid + metal reaction !?

Answer 8

. Their reaction with acid is too violent

Question 9

What is the chemical test for hydrogen !?

Answer 9

. Lit splint➡️ squeaky pop

(causes test tube to resonate)