Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Unit
Inorganic Chemistry
869 practice questions
Topics covered
- The Alkali Metals85 practice questions
- The Halogens86 practice questions
- Gases in the Atmosphere86 practice questions
- Reactivity Series163 practice questions
- Extraction and Uses of Metals128 practice questions
- Acids, Alkalis and Titrations83 practice questions
- Acids, Bases and Salt Preparations156 practice questions
- Chemical Tests68 practice questions
Practice questions
601–610 of 869
Question 601
3 marks · Normal
Answer and see the solution →A student adds hydrochloric acid (HCl), at a concentration of 0.020 mol/dm³, to water. Hydrochloric acid completely dissociates into ions:
Calculate the concentration of hydrogen ions (H⁺) in the solution after the HCl fully dissociates. Explain your reasoning.
Question 602
2 marks · Hard
Answer and see the solution →State the name and the full chemical formula of the ion that is present in all acidic solutions and causes acidity.
Question 603
5 marks · Hard
Answer and see the solution →The following table shows two acids and their reactions in water.
Acid Equation in water Acid A Acid B (a)[1 mark]For Acid A, explain what the presence of H^+ ions in solution tells you about the nature of the solution.
(b)[1 mark]For Acid B, how many moles of H^+ ions are formed from 1 mole of HB_2?
(c)[2 marks]Both Acid A and Acid B are added separately to water to make solutions.
Describe in terms of ions what occurs in each solution and which property they share.
(d)[1 mark]Explain, using one example from above, what is meant by the 'replaceable hydrogen' in acids.
Question 604
2 marks · Hard
Answer and see the solution →Name one metal compound (other than ammonia or sodium hydroxide) that makes water alkaline and write a balanced equation to show the formation of hydroxide ions in this solution.
Question 605
1 mark · Easy
Answer and see the solution →Name the piece of apparatus used to deliver small, measured volumes of acid into a conical flask during a titration.
Question 606
3 marks · Easy
Answer and see the solution →(a)[1 mark]State the colour change you would see when phenolphthalein is used as the indicator and the alkali in the conical flask is just neutralised by the acid from the burette.
(b)[1 mark]Give one reason why phenolphthalein is preferred over universal indicator for titrations.
(c)[1 mark]Name the flask used to hold the solution during a titration.
Question 607
2 marks · Easy
Answer and see the solution →During a titration, a student records an initial burette reading of 6.40 cm³ and a final reading of 28.15 cm³. Calculate the volume of solution delivered from the burette.
Question 608
2 marks · Easy
Answer and see the solution →Explain why titration readings should be recorded to two decimal places.
Question 609
3 marks · Easy
Answer and see the solution →(a)[1 mark]Titration Results Titration Initial burette reading / cm³ Final burette reading / cm³ 1 0.70 18.35 2 1.40 19.80 3 2.00 20.45 Calculate the titre (volume delivered) for Titration 1.
(b)[1 mark]Which titration is likely to be the rough (trial) titration? Give a reason for your answer.
(c)[1 mark]Suggest why the average titre is calculated using only concordant results.
Question 610
1 mark · Easy
Answer and see the solution →State the name of the procedure used to determine the volume of acid needed to neutralise a fixed volume of alkali.