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
571–580 of 869
Question 571
2 marks · Easy
Answer and see the solution →Explain why a solution with pH 11 is classified as strongly alkaline rather than weakly alkaline.
Question 572
3 marks · Easy
Answer and see the solution →A student uses universal indicator solution to test three unknown liquids. The results are recorded in Table 2.
Table 2: Universal indicator results Liquid Colour observed A orange B green C purple (a)[1 mark]State the likely pH of liquid B, based on the observed colour.
(b)[1 mark]Suggest the type of solution for liquid C (strong acid, weak acid, neutral, weak alkali, strong alkali).
(c)[1 mark]Describe how the universal indicator is used to obtain this information from the liquids.
Question 573
1 mark · Easy
Answer and see the solution →What colour does methyl orange turn in an alkaline solution?
Question 574
3 marks · Easy
Answer and see the solution →The table shows five solutions and their pH values.
Table 3: Solutions and their pH values Solution pH P 3 Q 6 R 7 S 9 T 13 (a)[1 mark]Identify which solution is neutral.
(b)[1 mark]State which solution is a weak acid.
(c)[1 mark]Which solution is strongly alkaline? Explain your answer.
Question 575
2 marks · Easy
Answer and see the solution →A universal indicator chart is shown below.
Universal Indicator Colours pH Colour 2 red 5 orange 7 green 10 blue 13 purple A student tests a solution and sees that it turns orange with universal indicator.
(a)[1 mark]Estimate the pH of the solution based on the chart.
(b)[1 mark]Classify the solution as strongly acidic, weakly acidic, neutral, weakly alkaline, or strongly alkaline.
Question 576
2 marks · Normal
Answer and see the solution →Describe how you would use universal indicator to find the pH of a solution.
Question 577
4 marks · Normal
Answer and see the solution →(a)[2 marks]State the colour of each indicator in an acidic solution.
Indicator Colour in Acidic Solution Litmus Methyl orange Phenolphthalein Universal indicator (b)[1 mark]State the colour of phenolphthalein in an alkaline solution.
(c)[1 mark]Name an indicator which is purple in a neutral solution.
Question 578
3 marks · Normal
Answer and see the solution →A solution has a pH of 2.5. State whether this solution is strongly acidic, weakly acidic, neutral, weakly alkaline, or strongly alkaline. Explain your answer using the pH range classifications.
Question 579
3 marks · Normal
Answer and see the solution →Explain why universal indicator is preferred over litmus paper when measuring the pH of a solution.
Question 580
4 marks · Normal
Answer and see the solution →A student tests four solutions using different indicators. Their observations are shown below.
Observations with indicators Solution Litmus Methyl Orange Universal Indicator A blue yellow blue B red red red C purple orange green D blue yellow green Complete the table below by identifying the likely pH or classification (acidic, neutral, or alkaline) for each solution.
Solution pH/classification A B C D