Year 7 Science 7F Acids and Alkalis Expected Attainment Confident Advanced Mastery Year Emerging Group Grade 7 1 Evaluate the effectiveness of Recall examples of everyday Use solutions of known acidity/alkalinity substances that are alkalis. in order to deduce a colour chart for an different indicators. indicator. Recall the colour changes associated Use information about indicator with litmus indicator. Explain why litmus is purple in neutral colour changes to design different solutions. Describe how indicators are used to indicators for different purposes. distinguish between acidic, alkaline Describe how universal indicator is used Apply ideas about the pH scale to and neutral solutions. to distinguish between acidic, alkaline explain the changes that take place and neutral solutions. Describe the main features of the pH on neutralisation and dilution. scale (numbered scale that shows Describe the use of universal indicator Plot and interpret graphs of pH how acidic or alkaline a solution is, and pH meters to determine the pH of a against volume of acid or alkali with solutions below pH 7 being solution. added in a neutralisation reaction acidic, those above pH 7 being Describe solutions as being more or less Describe how to produce a solution alkaline and those at pH 7 being acidic/alkaline by comparing their pHs. that is only a salt and water using neutral). Model simple reactions using word the reaction between an acid and Recall that acids react with alkalis and equations. an alkali or insoluble base this is called neutralisation. Describe the reactions of acids with Explain how chemical reactions are alkalis (including the salts produced by different to physical changes. hydrochloric, sulfuric and nitric acids). Interpret a word equation to identify Explain how everyday examples of the products and reactants in a neutralisation are useful (changing the pH chemical reaction. of soils). Recall some applications of Describe the reactions of acids with neutralisation (changing the pH of bases. soils). Explain how everyday examples of Supply missing reactants or products neutralisation are useful (antacids, to complete a word equation. toothpastes, treating waste gases, rust Correctly use the term: base. removal). Recall some applications of neutralisation (antacids, toothpastes, treating waste gases, rust removal).
Year 7 Science 7F Acids and Alkalis Expected Attainment Year Group Grade Emerging Confident Advanced Mastery 7 1 Recall examples of everyday substances that are alkalis. Recall the colour changes associated with litmus indicator. Describe how indicators are used to distinguish between acidic, alkaline and neutral solutions. Describe the main features of the pH scale (numbered scale that shows how acidic or alkaline a solution is, with solutions below pH 7 being acidic, those above pH 7 being alkaline and those at pH 7 being neutral). Recall that acids react with alkalis and this is called neutralisation. Explain how chemical reactions are different to physical changes. Interpret a word equation to identify the products and reactants in a chemical reaction. Recall some applications of neutralisation (changing the pH of soils). Supply missing reactants or products to complete a word equation. Correctly use the term: base. Recall some applications of neutralisation (antacids, toothpastes, treating waste gases, rust removal). Use solutions of known acidity/alkalinity in order to deduce a colour chart for an indicator. Explain why litmus is purple in neutral solutions. Describe how universal indicator is used to distinguish between acidic, alkaline and neutral solutions. Describe the use of universal indicator and pH meters to determine the pH of a solution. Describe solutions as being more or less acidic/alkaline by comparing their pHs. Model simple reactions using word equations. Describe the reactions of acids with alkalis (including the salts produced by hydrochloric, sulfuric and nitric acids). Explain how everyday examples of neutralisation are useful (changing the pH of soils). Describe the reactions of acids with bases. Explain how everyday examples of neutralisation are useful (antacids, toothpastes, treating waste gases, rust removal). Evaluate the effectiveness of different indicators. Use information about indicator colour changes to design different indicators for different purposes. Apply ideas about the pH scale to explain the changes that take place on neutralisation and dilution. Plot and interpret graphs of pH against volume of acid or alkali added in a neutralisation reaction Describe how to produce a solution that is only a salt and water using the reaction between an acid and an alkali or insoluble base