The pH scale shows how acidic a substance is. Learn what pH means and how it is measured in this KS3 chemistry guide from BBC Bitesize. Neutralisation reactions Acids and alkalis react together in ...

This means that the pH values of strong acids are lower than that of weak acids, which explains why the rate of reaction of strong acids with substances (such as metals, metal carbonates etc ...

Why Nature Chemistry spells sulfur with an 'f ... was the decision to spell element number 16 with an 'f' instead of 'ph'. For those who defend the 'ph' version of sulfur, there is little ...