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
331–340 of 359 · Easy
Question 331
2 marks · Easy
Answer and see the solution →A water sample was tested and its boiling point found to be 101.5°C at 1 atmosphere pressure. Calculate by how much the boiling point differs from that of pure water. Is the sample likely to be pure?
Question 332
2 marks · Easy
Answer and see the solution →A student carries out a test for ammonia gas using damp red litmus paper. The student expects to see the colour of the paper change. If the student starts with 5 pieces of damp red litmus paper and plans one test for each of 5 gas samples, how many pieces of red litmus paper will change colour if all 5 samples are ammonia gas? State the final colour of the litmus paper.
Question 333
1 mark · Easy
Answer and see the solution →State the name of the gas given off when dilute hydrochloric acid is added to a carbonate compound.
Question 334
3 marks · Easy
Answer and see the solution →(a)[1 mark]State the reagent added to a sample to test for carbonate ions.
(b)[1 mark]Describe what you would observe if carbonate ions are present after adding this reagent.
(c)[1 mark]Explain how you would confirm that the gas produced is carbon dioxide.
Question 335
3 marks · Easy
Answer and see the solution →Test results for carbonate ions. Sample Dilute acid added Fizzing observed Gas turns limewater cloudy X Yes Yes Yes Y Yes No - Z Yes Yes No (a)[1 mark]Which sample(s) most likely contain carbonate ions? Explain your answer.
(b)[1 mark]Suggest a possible identity for the gas produced from sample Z.
(c)[1 mark]Explain why sample Y does not give the same results as X.
Question 336
1 mark · Easy
Answer and see the solution →Write the ionic equation for the reaction between a carbonate ion and an acid.
Question 337
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 338
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 339
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 340
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