161,171 views
33 votes
33 votes
Is anyone good at chemistry if so can someone help me please ?

(NO LINKS)

Is anyone good at chemistry if so can someone help me please ? (NO LINKS)-example-1
User Raghava
by
2.7k points

1 Answer

15 votes
15 votes

So, litmus paper is a qualitative tool for assessing the acidity or basicity of a substance (usually a solution). In general, blue litmus turns red in the presence of an acid, and red litmus turns blue in the presence of a base. They can't really tell you much more than that.

The solutions that are most likely acids are those that turn blue litmus red and do not evoke a color change in red litmus. A solution that turns red litmus blue or does not evoke a color change in blue litmus is likely not an acid. Using these criteria, solutions 4 and 7 are most likely acids since they both turn blue litmus red (and they cause no color change in red litmus).

The correct answer choice would thus be D.

User Tabish
by
3.3k points