If i was given an unknown alkali solution, how do i show that it is a strong alkali and not a weak alkali???

Question

This is part of my chemistry homework. Pls tell me how with details included and also explain any 'difficlut' chemistry lingo used. thx

Answer 1

Measure its pH, using universal indicator solution or a pH meter.

If the pH is between 8 and 11, it's a weak alkali. If 12 - 14, it's a strong alkali.

Answer 2

1.Do the litmas test - red litmas will turn into blue
2. Give a reaction with an acid
3.after reacting with a weak acid ;the solution will contain a lot of -OH ion
.........................etc