Chemistry / Mātai matū

Topics covered:

Hands-on components:

Use pH indicator strips to test liquids such as milk, water, washing powder, vinegar
Magic noodles (using red cabbage juice)
Crack the code using the periodic table
thermochromic paint (colour change with heat)

Magic noodles: red cabbage juice as a pH indicator

Here are the sticks showing the colour change at 25°C (orange) and 35°C (yellow).

For repeat customers:

There are a couple of pH themes: students can investigate

the pH of household detergents (body wash, bar soap, washing liquid & powder). Our skin has a pH of 5.5. How does this compare to the detergents we use on our skin?
the pH of beverages (Kombucha, energy drinks, fruit tea, carbonated water). Acidic drinks are not good for our teeth. Which drinks should we be choosing to drink?