acids and alkalis

difference between them

Acids taste more acidic, while alkalis taste more bitter

Litmus paper

acid= blue paper turns red, alkali= red paper turns blue

ph scale

when you add universal indicater to the substance it will change colour, 1-3 strong acid, 4-6 weak acid. 7 neutral, 8-10 weak alkili 11-14 strong alkili

Neutralisation

it is where acid and alkili cancel each other out, ph7, Acid +alkali = water + a salt

reactivity of metal

metal + acid = a salt + hydrogen, the chemicals that we start with are called reactants and the result is products. e.g magnesium + hydrochloric acid= magnesium cholride + a salt