成人论坛

<<< previous

		The blue liquid turns red! Lemon juice is an acid and acids turn the cabbage juice a pinky-red colour.
		Next, try adding a little of the bicarbonate of soda. Give the mixture a shake again and see what happens.
		The liquid turns blue again! Bicarbonate of soda is alkaline and when you mix it with water it turns the cabbage juice blue.

How about putting in some clear vinegar? Can you predict what happens? Here's a hint - lemon juice is an acid.

check your prediction >>>

See also:

Simon Thomas interview

Design a Spring bonnet

Send in your monster pics

Fun science

Make a great raft

Design your own lunchbox

Make a soaring kite

Snappy crocodile

More links:




The 成人论坛 is not responsible for the content of external Internet sites