Yr.6 continued their work on reversible and irreversible reactions by looking at acids and how these react with carbonates to form carbon dioxide. First they tested water, lemon juice and vinegar on three substances, marble chips, washing soda crystals and bicarbonate of soda. They observed and recorded any changes which they noticed. They then worked in pairs to create a mini volcano. Finally they used a volcano kit which put the vinegar under more pressure causing a much more dynamic reaction. It was lots of fun!