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They do make their homework difficult these days don't they? 5 of each is rather alot!
For acids I can only think of vinegar, lemon juice, citrus fruit & ? tomato ketchup.
For alkalis there is bicarbonate of soda, alkali batteries, toothpastes that contain a whitening agent, oven cleaner, washing soda etc.
It is very difficult. Would be interested to know what the teacher comes up with?
For acids I can only think of vinegar, lemon juice, citrus fruit & ? tomato ketchup.
For alkalis there is bicarbonate of soda, alkali batteries, toothpastes that contain a whitening agent, oven cleaner, washing soda etc.
It is very difficult. Would be interested to know what the teacher comes up with?
"They do make their homework difficult these days don't they?"
Sorry, Sasperilla, I disagree - it's the same question I was asked in a Junior School science lesson about *cough* 30-odd years ago! And we had to bring samples into school aswell !
I still remember my teacher's reaction when, having seen countless yoghurt pots and jars with blobs and dribbles of soap, vinegar, lemon juice, washing powder etc. - he looks at my sample and asks what it was, and I explaianed to him that I "came across it" inside my dad's car battery........
Sorry, Sasperilla, I disagree - it's the same question I was asked in a Junior School science lesson about *cough* 30-odd years ago! And we had to bring samples into school aswell !
I still remember my teacher's reaction when, having seen countless yoghurt pots and jars with blobs and dribbles of soap, vinegar, lemon juice, washing powder etc. - he looks at my sample and asks what it was, and I explaianed to him that I "came across it" inside my dad's car battery........
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