You use a universal indicator and it turns into whatever colour, according to the PH scale.
pH 11 is an alkali not an acid
no you do not always need water to see whether something is acid or alkali
it is complete alkali
it is complete alkali
acid
alkali is used to reduce acid and acid is used to reduce alkali
Alkali.
Alkali
Alkali
alkali
And acid plus an alkali produces water and a salt.
To neutralize an alkali, you can add an acid to it. The acid will balance out the pH level by reacting with the alkali. Common acids used for neutralization include hydrochloric acid, sulfuric acid, and acetic acid.