Barium hydroxide reacts with dilute hydrochloric acid to form barium chloride and water - Edexcel - GCSE Chemistry Combined Science - Question 5 - 2022 - Paper 1
Question 5
Barium hydroxide reacts with dilute hydrochloric acid to form barium chloride and water.
(a) The equation for the reaction is
Ba(OH)₂(s) + 2 HCl(aq) → BaCl₂(aq) + ... show full transcript
Worked Solution & Example Answer:Barium hydroxide reacts with dilute hydrochloric acid to form barium chloride and water - Edexcel - GCSE Chemistry Combined Science - Question 5 - 2022 - Paper 1
Step 1
Which row of the table shows the correct state of each of the substances in the equation for the reaction?
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Answer
The correct answer is:
barium hydroxide
hydrochloric acid
barium chloride
water
A
solid
aqueous
liquid
This indicates that barium hydroxide is a solid, hydrochloric acid is aqueous, barium chloride is aqueous, and water is in liquid form. This aligns with the states of matter for each substance involved in the reaction.
Step 2
step 1
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Answer
Measure out 50.0 cm³ of dilute hydrochloric acid into a beaker using a measuring cylinder.
Step 3
step 2
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Answer
Use a solid to place a drop of the acid onto a piece of universal indicator paper and record the colour.
Step 4
step 3
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Answer
Add 0.2 g of barium hydroxide to the acid in the beaker and stir.
Step 5
step 4
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Answer
Use the glass rod to place a drop of the mixture onto a new piece of universal indicator paper and record the pH again.
Step 6
step 5
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Answer
Repeat steps 3–4 until there is no further change in the pH.
