Mandy is testing an unknown solution to determine whether it is an acid or a base. she places a piece of red litmus paper into the solution and the paper turns blue. mandy's unknown solution

The answer is Mandy’s solution is a Base/Alkaline solution. Alkaline solution turns red litmus blue while acidic solution turns blue litmus red. In acidic solution, the red litmus remains red while in alkaline solution, the blue litmus remains blue. However, litmus paper can never tell you the exact pH number of a solution

is a base.


Justification:


1) Litmus is a pH indicator.

2) Litmus paper may come in red or in blue. Here we have red litmus paper.

3) You can find in the literature that red litmus paper stays red in acidic or neutral solution, and turns blue in alkalyne solutions.


4) So, since the red litmus paper turned blue, the solution is alkalyne, this is a base

The third choice .. (:

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