Acid Reactions and pH — OCR GCSE Combined Science B J260
OCR GCSE Combined Science B · J260
Acid Reactions and pH
What you need to know
Recall that acids react with specific metals and carbonates, and write accurate chemical equations to predict the products of these specific reactants.
Describe standard practical laboratory procedures for synthesizing salts, demonstrating the appropriate use of filtration, evaporation, crystallisation, and drying techniques.
Deduce the correct chemical formulas of resulting ionic compounds using the standard formulas of common constituent ions.
Recall that relative acidity and alkalinity are universally quantified using the pH scale.
Describe the practical application of universal indicator solutions and digital pH meters in measuring relative acidity and alkalinity.
Use and clearly explain the terms 'dilute' and 'concentrated' to describe the absolute amount of substance in an acid solution.
Use and clearly explain the terms 'weak' and 'strong' to describe the degree of ionisation in acids, highlighting how this specifically alters their reactivity with metals and carbonates.
Understand and apply the mathematical principle that as the concentration of hydrogen ions increases by a factor of ten, the corresponding pH value of the solution decreases by exactly one integer unit.
Describe chemical neutrality, as well as relative acidity and alkalinity, strictly in terms of how varying hydrogen ion concentrations influence the numerical pH value.
