Practical skills

Practical skills in chemistry

A fair test changes one independent variable, measures the dependent variable, and keeps control variables the same. Record readings in a table with units in the headings and consistent precision (burette readings to $0.05\ \mathrm{cm^3}$). Repeat titrations until concordant (within $0.10\ \mathrm{cm^3}$) and average only those. Accuracy is closeness to the true value; precision is closeness of repeats. Evaluate by identifying errors and suggesting specific improvements.