Question

An experiment is carried out to produce hydrogen gas. Hydrochloric acid is poured into a glass, and magnesium is added to the acid. The reaction produces a soluble salt and hydrogen gas. 2.1 Write a balanced equation for the reaction. 2.2 Give the name of the soluble salt. 2.3 Has a physical or chemical change taken place? 2.4 2 moles of hydrogen is produced. How many moles of acid reacted?

Answer 1

Step-by-step explanation:

1) A balanced equation for the reaction.

`Mg(s)+2HCl(aq)\rightarrow MgCl_2(aq)+H_2(g)`

2) The name of the soluble slat produced by reaction between magnesium and hydrochloric acid is magnesium chloride.

Magnesium chloride =
`MgCl_2`

3)Yes, chemical change has been taking.

This is because rearrangement of atom is taking place which resulted in formation of hydrogen gas amd magnesium chloride.

4) Moles of hydrogen gas produced = 2 mole

According to reaction, 1 mole of hydrogen gas is obtained from 2 moles of HCl.

Then 2 moles of hydrogen gas will be obtained form:

`(2)/(1)* 2=4 mol` of HCl

4 moles of acid has reacted.