The correct answer is C. is a base.
Red litmus paper turns blue in the presence of a base, indicating that the unknown solution has basic properties.
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
A.
is an acid.
B.
does not have a pH.
C.
is a base.
D.
is a neutral substance.
1 answer