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
231–240 of 359 · Easy
Question 231
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 232
1 mark · Easy
Answer and see the solution →State the pH value that classifies a solution as neutral.
Question 233
3 marks · Easy
Answer and see the solution →A student is given a solution and asked to measure its pH using universal indicator.
(a)[2 marks]Describe how the student should use universal indicator solution to estimate the pH of the solution.
(b)[1 mark]Explain how the student can decide on the pH value after adding the indicator.
Question 234
2 marks · Easy
Answer and see the solution →Table 1 shows the colour changes of three common indicators in different solutions.
Table 1: Indicator colours in acid and alkali Indicator Colour in Acid Colour in Alkali Litmus red ? Methyl orange red yellow Phenolphthalein ? pink (a)[2 marks]Complete the table by giving the colour of litmus in alkali and phenolphthalein in acid.
Question 235
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 236
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 237
1 mark · Easy
Answer and see the solution →What colour does methyl orange turn in an alkaline solution?
Question 238
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 239
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 240
1 mark · Easy
Answer and see the solution →State the ion responsible for the alkalinity of sodium hydroxide solution.