Question

Hydrogen is one of the products when hydrochloric acid reacts with magnesium explain why the loss of hydrogen during the reaction cannot easily be measured using a balance

Answer 1

Answer:

50 cm3 of 1M hydrochloric acid is a six-fold excess of acid. In this reaction, the magnesium and acid are gradually used up. However the acid is in excess, so it is mainly the loss of magnesium (surface area becomes smaller) that causes the change in the rate.

Answer 2

Answer:

Due to a Change in rate.

Explanation:

Given: Here we have hydrogen as one of the products when hydrochloric acid reacts with magnesium.

To find: We have to explain why the loss of hydrogen during the reaction cannot easily be measured using a balance.

Concept: Dilute hydrochloric acid or sulphuric acid are typically used to create hydrogen gas in laboratories by reacting with zinc grains. Because it typically contains a small amount of copper, which has the capacity to act as a catalyst for the associated chemical reaction and, as a result, increases the rate of the chemical reaction without actually participating in it, granulated zinc is ideal for the preparation of hydrogen gas in chemical laboratories.

Step 1

Acids react with metals to produce hydrogen gas and metal salts. Magnesium is a metal that reacts quickly. Magnesium chloride and hydrogen gas will be produced during the reaction with hydrochloric acid. The following will happen as a result:

$Mg(s)+2HCl(aq)$ ⇒$MgCl_{2} (aq)+H_{2}(g)$

Hence, due to a change in rate loss of hydrogen takes place.

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