Sunday
April 20, 2014

Homework Help: Chemistry

Posted by Lauren--PLEASE HELP on Sunday, November 29, 2009 at 1:47pm.

Analysis of Tap water (Hardness)

Was analyzed by a complexometric titraion by the following equations 1 & 2

1. Ca^2+ + Mg^2+ --> Ca^2+ + Mg(Indicator)

2. Mg(Indicator) + Ca^2+ + EDTA^4- --> CaEDTA^2- + MgEDTA^2- + free indicator

For the volume of titrant used (9.95 mL) calculate the:

a) Ca^2+ + Mg^2+ in sample (mol)
b)[Ca^2+] + [Mg^2+] of sample (M)

PLEASE HELP! I am very confused with this question and any guidance would be greatly appreciated!!!

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