alkalinity in terms of Describe relative acidity in the effect of the terms of hydrogen ion concentration of concentration. hydrogen ions on the numerical value of pH (whole numbers only). 4.7.4 The rate and extent of chemical change Spec ref. Summary of the specification Learning outcomes Suggested Opportunities to develop Opportunities to Self/peer assessment content timing Scientific Communication skills practical and enquiry Opportunities and What most candidates skills resources should be able to do Reference to past questions that indicate success 4.7.4.1 The rate of a chemical Describe the effect of 1 Use graphical data to explain React CaCO3 with reaction can be found by changes in each part of the ie: dilute HCl and measure measuring the quantity of a temperature, the volume of CO2 initially rate is fast reactant used or the quantity concentration, evolved against time. slows down of product formed over time: pressure, and surface
alkalinity in terms of the effect of the concentration of hydrogen ions on the numerical value of pH (whole numbers only). Describe relative acidity in terms of hydrogen ion concentration. 4.7.4 The rate and extent of chemical change Spec ref. Summary of the specification content Learning outcomes What most candidates should be able to do Suggested timing Opportunities to develop Scientific Communication skills Opportunities to practical and enquiry skills Self/peer assessment Opportunities and resources Reference to past questions that indicate success 4.7.4.1 The rate of a chemical reaction can be found by measuring the quantity of a reactant used or the quantity of product formed over time: Describe the effect of changes in temperature, concentration, pressure, and surface 1 Use graphical data to explain each part of the ie: initially rate is fast slows down React CaCO3 with dilute HCl and measure the volume of CO2 evolved against time.