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
811–820 of 869
Question 811
1 mark · Easy
Answer and see the solution →Write the ionic equation for the reaction between a carbonate ion and an acid.
Question 812
3 marks · Easy
Answer and see the solution →(a)[2 marks]A teacher gives you a sample to test for carbonate ions. Describe fully how you would carry out this test.
(b)[1 mark]State how you would know if carbonate ions are present.
Question 813
2 marks · Easy
Answer and see the solution →A student tests 0.20 g of sodium carbonate powder by adding excess dilute hydrochloric acid. Calculate the maximum volume of carbon dioxide gas produced at room temperature and pressure (RTP), assuming that 1 mole of gas occupies 24 dm^3 at RTP. (Relative formula mass of Na2CO3 = 106)
Question 814
2 marks · Easy
Answer and see the solution →A powder is suspected to contain carbonate ions (CO3^2-). Describe the two steps you would take to confirm the presence of carbonate ions in the powder and explain what results would show that carbonate ions are present.
Question 815
2 marks · Easy
Answer and see the solution →A student wants to test for carbonate ions using dilute hydrochloric acid. She needs at least 0.22 g of carbon dioxide gas (CO2) to turn limewater cloudy. Calculate the minimum mass of sodium carbonate (Na2CO3) required to produce 0.22 g of CO2, assuming all of the carbonate reacts and only this gas is formed.
Relative atomic masses: Na = 23, C = 12, O = 16
Question 816
4 marks · Normal
Answer and see the solution →A student tests a solid substance to find out if it contains carbonate ions. The student adds dilute sulfuric acid and observes bubbles of gas. They collect the gas and pass it through limewater.
(a)[1 mark]Write the ionic equation for the reaction between carbonate ions () and sulfuric acid.
(b)[1 mark]State the identity of the gas formed.
(c)[1 mark]Describe the observed result when the gas is bubbled through limewater.
(d)[1 mark]Explain how these observations confirm that the original solid contained carbonate ions.
Question 817
4 marks · Normal
Answer and see the solution →A student is testing three white powders (A, B and C) for carbonate ions using dilute hydrochloric acid and limewater. Their results are shown:
Student's results for carbonate test Powder Acid added Fizzing observed? Limewater turns cloudy? A Yes Yes Yes B Yes No No C Yes Yes No (a)[2 marks]Which powder(s) definitely contain carbonate ions? Explain your answer.
(b)[2 marks]Suggest a reason why powder C showed fizzing but did not turn limewater cloudy.
Question 818
1 mark · Normal
Answer and check →Which observation indicates the presence of carbonate ions when dilute hydrochloric acid is added to a solid sample?
- A.The sample turns blue
- B.A green precipitate forms
- C.Effervescence (bubbles of gas) occurs
- D.The temperature falls
Question 819
2 marks · Normal
Answer and see the solution →Complete these sentences about the test for carbonate ions. (1) When dilute acid is added to a carbonate compound, __________ is given off. (2) This gas can be tested using __________.
Question 820
4 marks · Normal
Answer and see the solution →A teacher places a small amount of white powder in a test tube and adds dilute nitric acid. Bubbles appear. To confirm the identity of the gas, another experiment is performed with limewater.
(a)[1 mark]Write the formula for the ion being tested.
(b)[1 mark]State the name and formula of the gas formed.
(c)[1 mark]Describe the chemical test for this gas.
(d)[1 mark]State the positive result for this test.