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Lab on Determining hard water

Not sure if I answered this currently, not completely sure how to explain either.

If a student has a non-zero blank correction, but forgets to include that correction in his/her calculations:? a. Would his/her calculated [EDTA] be correct, too high, or too low? b. Would his/her calculated [Ca] in the unknown be correct, too high, or too low?

Not quite sure if my answers are right:
A. EDTA would be a too high
B. Calculate would be low

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