Zadania z chemii IB SL

Describe how a standard aqueous solution of potassium manganate(VII) can be prepared from the solid.

Describe the steps by which this standard solution is turned into a calibration curve for the colorimeter.

Explain how the calibration curve is then used to determine the concentration of $\ce{KMnO4}$ in a reaction mixture of unknown concentration.

The kinetic molecular theory describes matter as particles in constant motion. State and explain two physical properties of a gas using this model.

Which diagram shows the electron configuration of an oxygen atom in its ground state? A. Diagram A B. Diagram B C. Diagram C D. Diagram D

Draw a line of best fit on the graph, extrapolating it beyond the range of the data.

State, in mathematical terms, how the absorbance of these solutions depends on their concentration.

Deduce the equation that relates absorbance to concentration for these solutions, including the numerical value of the constant.

Estimate the absorbance of a 0.400 $\mathrm{mol\,dm^{-3}}$ solution of nickel(II) sulfate.