Question

A chemist often uses a white card with a black mark to aid in reading the meniscus of a clear liquid. How does this technique make the reading more accurate? Answer in 5 sentences.

Answer 1

The white gives a more accurate reading of the substance because it can be used as a part of comparison. The card will be visible in the meniscus against the black mark, they'll see the white very clearly, giving them an accurate the reading.