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
551–560 of 869
Question 551
2 marks · Easy
Answer and see the solution →A student tests two solutions with litmus paper. Solution X turns blue litmus red. Solution Y turns red litmus blue. How many solutions are acidic?
Question 552
2 marks · Easy
Answer and see the solution →Explain why a solution with a pH of 5 is not considered strongly acidic. Include information about the pH scale in your answer.
Question 553
3 marks · Easy
Answer and see the solution →Results of adding indicators to three unknown solutions. Solution Litmus (colour) Methyl orange (colour) Phenolphthalein (colour) A red red colourless B blue yellow pink C blue yellow colourless Use the table to answer the following questions about solutions A, B, and C.
(a)[1 mark]Which solution is acidic?
(b)[1 mark]Which solution is alkaline?
(c)[1 mark]Which indicator could you use to distinguish solutions B and C? State the colour it would show for each.
Question 554
1 mark · Easy
Answer and see the solution →State the pH value of a neutral solution.
Question 555
3 marks · Easy
Answer and see the solution →Some students are testing three household substances with universal indicator.
(a)[1 mark]Explain what universal indicator does when added to an aqueous solution.
(b)[1 mark]A solution turns orange with universal indicator. State if this solution is acidic, neutral or alkaline.
(c)[1 mark]Which household substance is likely to give a universal indicator colour of purple? Choose from: vinegar, tap water, sodium bicarbonate solution, bleach.
Question 556
2 marks · Easy
Answer and see the solution →A solution has a pH of 10. How many whole numbers above the neutral pH is this solution? Show your working.
Question 557
2 marks · Normal
Answer and see the solution →State the colour change observed when litmus paper is placed in (a) an acidic solution and (b) an alkaline solution.
(a)[1 mark]Colour of litmus paper in an acidic solution:
(b)[1 mark]Colour of litmus paper in an alkaline solution:
Question 558
4 marks · Normal
Answer and see the solution →The table below shows the pH values of four different aqueous solutions.
Solution pH P 2 Q 5 R 8 S 13 (a)[1 mark]State which solution is strongly acidic.
(b)[1 mark]State which solution is neutral.
(c)[1 mark]State which solution is weakly alkaline.
(d)[1 mark]State which solution is strongly alkaline.
Question 559
3 marks · Normal
Answer and see the solution →A student adds methyl orange to a solution. The solution turns yellow. They mix the solution with just enough acid to make the colour just change to red.
Estimate the change in pH that the student has achieved. State your reasoning.
Question 560
3 marks · Normal
Answer and see the solution →Explain why a solution with pH 6 is described as weakly acidic and how you could confirm this using an indicator.