Just before half-term Mrs Hammond’s Science Club took on the pH rainbow challenge! The students were given test tubes of water, acid solution, alkaline solution and universal indicator fluid. They were then tasked with mixing 14 solutions to each pH level, indicated by a different colour. Thus creating their liquid rainbow.

The activity requires precision and patience, with even the slightest over-pour of either solution pushing your colour too far in the wrong direction. Red and orange shades are produced when universal indicator is added to acidic solutions, greens when the pH level is fairly neutral and blue to purple shades are at the alkaline end of the scale.

The club managed very well and produced some very accurate rainbows.

Senior School | 24/02/20