Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Unit
Principles of Chemistry
991 practice questions
Topics covered
- States of Matter102 practice questions
- Elements, Compounds and Mixtures69 practice questions
- Atomic Structure108 practice questions
- The Periodic Table103 practice questions
- Chemical Formulae, Equations and Calculations Part 119 practice questions
- Chemical Formulae, Equations and Calculations Part 2144 practice questions
- Ionic Bonding143 practice questions
- Covalent Bonding68 practice questions
- Metallic Bonding19 practice questions
- Electrolysis198 practice questions
Practice questions
521–530 of 991
Question 521
1 mark · Easy
Answer and see the solution →State the information you must know to calculate the volume of a solution required to react with a known amount of another reactant.
Question 522
3 marks · Easy
Answer and see the solution →20.0 cm³ of a solution contains 0.00400 mol of a substance.
(a)[1 mark]Calculate the volume of the solution in dm³.
(b)[1 mark]Calculate the concentration of the solution in mol/dm³.
(c)[1 mark]State the formula used for this calculation.
Question 523
2 marks · Easy
Answer and see the solution →Nitric acid reacts with sodium carbonate according to the following equation:
Calculate the minimum volume, in cm³, of 0.250 mol/dm³ nitric acid solution needed to completely react with 25.0 cm³ of 0.100 mol/dm³ sodium carbonate solution.
Question 524
2 marks · Normal
Answer and see the solution →Sodium carbonate solution reacts with hydrochloric acid:
Calculate the volume (in cm³) of 0.200 mol/dm³ sodium carbonate solution required to completely react with 30.0 cm³ of 0.400 mol/dm³ hydrochloric acid.
Question 525
4 marks · Normal
Answer and see the solution →A laboratory technician needs to prepare a solution containing 0.00250 mol of silver nitrate (AgNO₃) and wants the final concentration to be 0.0500 mol/dm³.
(a)[1 mark]Write the equation used to calculate the required volume (in dm³) of solution.
(b)[2 marks]Calculate the volume of solution (in dm³) required to obtain the stated concentration.
(c)[1 mark]Convert your answer to part (b) into cm³.
Question 526
3 marks · Normal
Answer and see the solution →Potassium hydroxide solution reacts with sulfuric acid as follows:
Calculate the minimum volume (in cm³) of 0.150 mol/dm³ sulfuric acid required to completely react with 25.0 cm³ of 0.300 mol/dm³ potassium hydroxide solution.
Question 527
3 marks · Normal
Answer and see the solution →Explain, using a calculation, how you would work out the volume of 0.250 mol/dm³ potassium hydroxide solution needed to neutralise 10.0 cm³ of 0.500 mol/dm³ sulfuric acid, given the following equation:
Show your reasoning and working clearly.
Question 528
2 marks · Normal
Answer and see the solution →Ammonia reacts with hydrochloric acid according to the equation:
Calculate the required volume (in cm³) of 0.250 mol/dm³ ammonia solution needed to react completely with 15.0 cm³ of 0.200 mol/dm³ hydrochloric acid solution.
Question 529
4 marks · Normal
Answer and see the solution →A student has 0.00800 mol of citric acid dissolved in water to make a solution. She needs to prepare the solution so that its concentration is exactly 0.200 mol/dm³.
(a)[1 mark]Write the rearranged formula used to calculate the volume required in dm³, in terms of moles and concentration.
(b)[2 marks]Calculate the required volume of solution, in dm³, to make the desired concentration.
(c)[1 mark]Convert your answer from (b) to cm³.
Question 530
3 marks · Normal
Answer and see the solution →Explain, step by step, how you would calculate the required volume of one solution needed to react completely with a known amount of another reactant, using their concentrations and the chemical equation. Include the reason for each step.