Question

how to know whether the substance is acid or base​

Answer 1

To determine whether a substance is an acid or a base, count the hydrogens on each substance before and after the reaction. If the number of hydrogens has decreased that substance is the acid (donates hydrogen ions). If the number of hydrogens has increased that substance is the base (accepts hydrogen ions).

Answer 2

Answer:

Hi!!! Using litmus paper

Explanation:

If the red litmus paper changes to blue, the following substance is base.

And if the blue litmus paper changes red, the following substance is acid.

To remember this easily:

'B' for Base and 'B' for Blue.

So, basic (base) substance or solution changes red litmus paper to blue... and remaining, the acid substance or solution will be changing to red.

Hope this helps you!! ✌️✌️✌️✌️