Question

CAN SOMEONE PLEASE HELP

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Answer 1

5.1 x 10^-3 M

Step-by-step explanation:

Find number of moles of KOH used

.050 M /L * .017 L = .00085 moles of KOH

from the reaction equation, this will react with 1/2 as many moles of Ca 2+

or .000425 moles of Ca <===== in .084 Liter of water

.000425 moles / .084 liter = .00505 M =~ 5.1 x 10^-3 M