Chapter 49

Select appropriate graphical presentations. Choose an appropriate graphical form for each of the following examples: (a) A titration curve showing the influence of \(0.1 \mathrm{M} \mathrm{NaOH}\) on \(\mathrm{pH}\) following the addition of \(0.1 \mathrm{M} \mathrm{HCl}\) (b) The concentration of lead in blood from 100 children. (c) The determination of selenium in bread flour. (d) The sand, silt and clay content of a soil sample. (e) A quality control chart for the paracetamol content of tablets.

Create a pie chart. Display the following information in the form of a pie chart. Typical composition of a breakfast cereal. $$ \begin{array}{ll} \hline \text { Content } & \text { Typical value per } \mathbf{1 0 0} \mathbf{~ g} \\ \hline \text { Protein } & 6 \mathrm{~g} \\ \text { Carbohydrate } & 83 \mathrm{~g} \\ \text { Fat } & 5 \mathrm{~g} \\ \text { Fibre } & 4 \mathrm{~g} \\ \text { Other } & 2 \mathrm{~g} \\ \hline \end{array} $$

Create a frequency distribution histogram. The table below gives data for the fructose concentration in 100 samples of fruit juice. Plot a histogram showing the frequency distribution of the data. Write a brief description of the important features of the distribution. $$ \begin{aligned} &\text { Fructose content }\left(g L^{-1}\right) \text { in fruit juice }\\\ &\begin{array}{|r|r|r|r|r|r|r|r|r|r|} \hline 11.1 & 14.2 & 13.5 & 9.8 & 12.0 & 13.9 & 14.1 & 14.6 & 11.0 & 12.3 \\ \hline 13.4 & 12.9 & 12.9 & 10.0 & 13.1 & 11.8 & 12.6 & 10.7 & 8.1 & 11.2 \\ \hline 13.8 & 12.4 & 12.9 & 11.3 & 12.7 & 12.4 & 14.6 & 15.1 & 11.2 & 9.7 \\ \hline 11.3 & 14.7 & 10.8 & 13.3 & 11.9 & 11.4 & 12.5 & 13.0 & 11.6 & 13.1 \\ \hline 9.3 & 13.5 & 14.6 & 11.2 & 11.7 & 10.9 & 12.4 & 12.0 & 12.1 & 12.6 \\ \hline 10.9 & 12.1 & 13.4 & 9.5 & 12.5 & 11.6 & 12.2 & 8.8 & 10.7 & 11.1 \\ \hline 10.2 & 11.7 & 10.4 & 14.0 & 14.9 & 11.5 & 12.0 & 13.2 & 12.1 & 13.3 \\ \hline 12.4 & 9.4 & 13.2 & 12.5 & 10.8 & 11.7 & 12.7 & 14.1 & 10.4 & 10.5 \\ \hline 13.3 & 10.6 & 10.5 & 13.7 & 11.8 & 14.1 & 10.3 & 13.6 & 10.4 & 13.9 \\ \hline 11.7 & 12.8 & 10.4 & 11.9 & 11.4 & 10.6 & 12.7 & 11.4 & 12.9 & 12.1 \\ \hline \end{array} \end{aligned} $$