When analyzing mineral samples for the presence of carbonate ions, geologists look for characteristic effervescence when an acid is added.
In a laboratory investigation, a sample of solid potassium carbonate, K2CO3\text{K}_2\text{CO}_3K2CO3, is reacted with dilute nitric acid, HNO3\text{HNO}_3HNO3, to produce a soluble salt, water, and carbon dioxide gas.
Complete and balance the equation for this reaction.
K2CO3+2HNO3→……⋯+……⋯+……… \text{K}_2\text{CO}_3 + 2\text{HNO}_3 \rightarrow \dots\dots\dots + \dots\dots\dots + \dots\dots\dots K2CO3+2HNO3→……⋯+……⋯+………276 exam-style questions on Edexcel GCSE Chemistry 4.1 Acids, covering 4.1.1 Acids, alkalis and the pH scale, 4.1.2 Hydrogen ion concentration and pH, 4.1.3 Dilute and concentrated, weak and strong acids, 4.1.4 Bases, alkalis and the reactions of acids, 4.1.5 Chemical tests for hydrogen and carbon dioxide, 4.1.6 Neutralisation as a reaction of acids with bases, 4.1.7 Preparing soluble salts, and 4.1.8 Solubility rules and preparing insoluble salts. Each one has a worked solution and a mark scheme showing where the marks go.