Chemistry with Katie

Last term I did chemistry with Katie. We used red cabbage water to test if certain household items were an acid or a base.  We got to choose what we wanted to test.  The options were... lemon juice, milk, hand sanitiser, vinegar, baking soda, tomato juice, dish washing liquid or tea.  I chose tea.  If the substance was an acid, the cabbage water would turn PINK.  If the substance was a base, the cabbage water would turn BLUE.  When I tested the tea, it did not change the cabbage water to pink, or blue - it just went a brown colour!  To find out if tea was an acid or a base, I used a piece of litmus paper and compared the colour with the pH Scale.  The litmus paper went GREEN - that means tea is a NEUTRAL, which is probably why we can drink it! It was fun and easy to do.