water:Etda::20:3
D is the answer
what is the ration of water drops to EDTA (ethylenediamene tetraacetic acid) if 3 drops of EDTA was needed to change the color of 20 drops of water with known hardness??
a. 0.15
b. 1.0
c. 4.0
d. 6.7
am I missing something huge here??
2 answers
what about this??
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
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
3 answers