Chemistry for Cambridge IGCSE

How to use this series; How to use this book; Introduction; Maths skills grid; 1. Representing values; Maths focus 1: Using units; Maths skill 1: Choosing the correct unit; Maths skill 2: Writing the unit symbol; Maths skill 3: Writing symbols for derived units; Maths focus 2: Understanding very large and very small numbers; Maths skill 1: Understanding place value; Maths skill 2: Understanding powers of 10; Maths skill 3: Understanding unit prefixes; Maths focus 3: Writing numbers in a required form; Maths skill 1: Writing numbers in standard form; Maths skill 2: Writing numbers to the required number of significant figures; 2. Working with data; Maths focus 1: Collecting data; Maths skill 1: Reading scales; Maths skill 2: Recording to the correct number of decimal places; Maths focus 2: Understanding types of data; Maths skill 1: Identifying independent and dependent variables; Maths skill 2: Distinguishing categorical, continuous and discrete data; Maths focus 3: Recording and processing data; Maths skill 1: Drawing tables; Maths skill 2: Drawing tables to help process data; Maths skill 3: Recording processed data to the correct number of significant figures; 3. Drawing charts and graphs; Maths focus 1: Drawing bar charts; Maths skill 1: Choosing a suitable scale for the vertical axis (y-axis); Maths skill 2: Drawing the bars; Maths focus 2: Drawing pie charts; Maths skill 1: Converting percentages to angles; Maths skill 2: Drawing the sectors; Maths focus 3: Drawing line graphs; Maths skill 1: Choosing which variable goes on which axis; Maths skill 2: Drawing the axes; Maths skill 3: Plotting the data points; Maths skill 4: Using a ruler to draw a best-fit line; Maths skill 5: Drawing a best-fit curve freehand; 4. Interpreting data; Maths focus 1: Interpreting charts; Maths skill 1: Interpreting the heights of bars on a bar chart; Maths skill 2: Comparing the sizes of sectors on a pie chart; Maths focus 2: Reading values from a line graph; Maths skill 1: Interpolating line graphs; Maths skill 2: Extrapolating line graphs; Maths skill 3: Finding the intercept; Maths focus 3: Interpreting the shape of line graphs; Maths skill 1: Recognising the shape of the graph; Maths skill 2: Interpreting the changing gradient of a curve; Maths skill 3: Calculating the gradient of a straight-line graph; 5. Doing calculations; Maths focus 1: Using basic mathematical operations in calculations; Maths skill 1: Working out the correct calculation for relative formula mass; Maths skill 2: Using mathematical operations in the correct order to calculate relative formula mass; Maths skill 3: Calculating number of particles using powers of 10 (Supplement); Maths skill 4: Using positive and negative values to interpret the overall enthalpy change of a chemical reaction (Supplement); Maths focus 2: Calculating and using percentages; Maths skill 1: Calculating percentage composition by mass; Maths skill 2: Calculating percentage yield; Maths skill 3: Calculating percentage purity; Maths skill 4: Using percentages to calculate relative atomic mass; Maths focus 3: Using mathematical formulae in calculations (Supplement); Maths skill 1: Substituting values into a mathematical formula; Maths skill 2: Rearranging a mathematical formula; Maths skill 3: Using titration results to calculate the concentration of a solution; Maths focus 4: Calculating using proportional relationships; Maths skill 1: Recognising directly and indirectly proportional relationships; Maths focus 5: Calculating using ratios; Maths skill 1: Using ratio to work out reacting masses; Maths skill 2: Using ratio and moles to work out reacting masses (Supplement); 6. Working with shape; Maths focus 1: Comparing surface area and volume; Maths skill 1: Calculating surface area; Maths skill 2: Comparing the surface area to volume ratio; Applying more than one skill; Appendix: The Periodic Table; Glossary; Acknowledgements;