GCSE Edexcel Chemistry Investigating neutralisation reactions: Barium hydroxide reacts with dil

Question

Barium hydroxide reacts with dilute hydrochloric acid to form barium chloride and water.

(a) The equation for the reaction is

Ba(OH)₂(s) + 2HCl(aq) → BaCl₂(aq) + 2H₂O(l)

Which row of the table shows the correct state of each of the substances in the equation for the reaction?

| barium hydroxide | hydrochloric acid | barium chloride | water |
|------------------|--------------------|------------------|-------|
| A                | solid              | liquid            | aqueous |
| B                | aqueous            | solid             | aqueous |
| C                | aqueous            | aqueous           | liquid |

(b) A student wanted to investigate how the pH of the mixture changes as barium hydroxide is added to dilute hydrochloric acid.

They followed this method.

step 1: Use a ruler to place a drop of the acid onto a piece of universal indicator paper and record the pH

step 2: Add 50.0 cm³ of dilute hydrochloric acid into a beaker using a measuring cylinder

step 3: Add 0.2 g of barium hydroxide into the beaker and stir

step 4: Use a ruler to place a drop onto the universal indicator paper and record the pH again

step 5: Repeat steps 3–4 until there is no further change in the pH.

(c) Name a piece of equipment which could be used to measure 50.0 cm³ of dilute hydrochloric acid more accurately than using a measuring cylinder.

Barium hydroxide reacts with dilute hydrochloric acid to form barium chloride and water - Edexcel - GCSE Chemistry - Question 8 - 2022 - Paper 1

Worked Solution & Example Answer:Barium hydroxide reacts with dilute hydrochloric acid to form barium chloride and water - Edexcel - GCSE Chemistry - Question 8 - 2022 - Paper 1

The correct state of each substance in the equation for the reaction

Name a piece of equipment which could be used to measure 50.0 cm³ of dilute hydrochloric acid more accurately than using a measuring cylinder.

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