Question
what is the ratio of water drops to EDTA if 2 drops of EDTA was needed to change the color of 20 drops of water with unknown hardness?
a. 10
b. 5
c. 0.1
d. 1.0
a. 10
b. 5
c. 0.1
d. 1.0
Answers
DrBob222
Bob Pursley answered below.
alex
Bob pursle answered a very similar question this one has 2 drops and unknown hardness...
John
What is the Answer