Question

Which of the following values of pH will change red litmus paper blue?
A. 3.1
B. 6.2
C. 7.0
D. 13.5

Answer 1

13.5 is the right answer

Answer 2

Heyaa..

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√ I hope.. you already know about the pH values and all that..

√ But even.. I'll give a short recap of what you must have learnt...

√ pH is the measuring of hydrogen ion concentration. ..

√ With the pH value, we decide whether a thing is acid or base..

√ The pH scale ranges from 0 to 14...

√ If the value DECREASES.. it becomes ACID.. if it is 0 it is considered to be more acidic and strong acid..

√ If the value INCREASES.. it grows to be a BASE.. If the value is 14.. it is considered to be more basic and a strong base..

√ And if the value is 7..It is said to be NEUTRAL ..

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% Now.. Coming to your question..

% If the litmus changes from red to blue.. It indicates the presence of a base..

% So, let's check from the given options which is a base..

__ A ) 3.1 - A strong acid

__ B ) 6.2 - Weak acid

__ C ) 7.0 - Neutral

__ D ) 13.5 - Strong Base..

% So.. You answer is

$option \: d \: is \: the \: answer$

$answer \: : \: 13.5$


Hope it helps..

And here CutieBarbie :)