GCSE OCR Gateway Chemistry 4.2 Reactions of Acids: Complete the word equation for n

Question

Complete the word equation for neutralisation.

acid + alkali → salt + .......... (1)

A student reacts magnesium carbonate with dilute hydrochloric acid. Carbon dioxide gas and a salt are made.

(i) What is the name of the salt made? (1)

(ii) The diagram shows the apparatus the student uses.

How can the student tell when the reaction is complete? (1)

(iii) The student records the mass on the balance every 2 minutes for 12 minutes.

The student's results are shown in the table.

Time (minutes) | Mass (g)
0              | 154.2
2              | 150.5
4              | 148.2
6              | 146.5
8              | 145.3
10             | 144.0
12             | 142.9

The mass before the reaction starts is 154.2g.

How much carbon dioxide gas is made after 8 minutes? (2)

Mass of carbon dioxide = ..................................... g (2)

The student wants to prepare a pure, dry sample of the soluble salt.
This is made by reacting magnesium carbonate and dilute hydrochloric acid.

Select the three correct steps that the student uses to prepare the pure, dry salt.
Put them in the order the student completes each step by labelling them 1, 2 and 3.

Crystallise the filtrate in an evaporating basin. 
Distil the filtrate using fractional distillation.
Filter the solution, leaving the magnesium carbonate in the filter paper.
Leave the solution, leaving the salt in the filter paper.
React hydrochloric acid with excess magnesium carbonate.
React magnesium carbonate with excess hydrochloric acid.

Complete the word equation for neutralisation - OCR Gateway - GCSE Chemistry - Question 17 - 2022 - Paper 1

Worked Solution & Example Answer:Complete the word equation for neutralisation - OCR Gateway - GCSE Chemistry - Question 17 - 2022 - Paper 1

Complete the word equation for neutralisation.

What is the name of the salt made?

How can the student tell when the reaction is complete?

How much carbon dioxide gas is made after 8 minutes?

Select the three correct steps that the student uses to prepare the pure, dry salt.

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