Unit 3 --- Properties of Acids and Alkalis
In the sATs exam you will be expected to know properties of acids and alkalis.
Properties of Acids
Acids have a low pH --- a low pH is below pH7
Acids taste sour --- some weak acids are edible (e.g. vinegar) but have a sharp and sour taste.
Acids kill some cells --- acids can damage living cells like skin and bacteria
Acids produce Carbon Dioxide
Acids produce Hydrogen --- acids make hydrogen when they react with some metals
Properties of Alkalis
Alkalis have a high pH --- a high pH is above pH7
Alkalis often feel soapy --- they feel slimy when touched
Alkalis are soluble bases --- soluble bases dissolve in water to make an alkaline solution.
Alkalis can be corrosive --- they are often hard to wash off so they can burn your skin worse than an acid.
