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starlight5
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EDTA titration?!URGENT NEED HELP
we did a lab in school to determine water hardness by EDTA titration. I did three trials , first one require 38mL , 2nd - 50 and third-42 the question was to averge the volumes of EDTA used in the last two titrations and to calculate the moles of EDTA required for the titration. do u just averge the two volumes and multiply it by the molar concentraion of EDTA to get the moles?
and how do u calculate the molarity of metal ion present in the water sample? i kno that EDTA binds the metal ions in a 1 to 1 ratio.
and for the question above how can u change it to ppm Ca
also when there is a question asking to draw a lewis dot formula of EDTA and show the 6 electron pairs donated by the lewis , am i just supposed to draw the lewis structure?
how does the reaction of EDTA w/metal ions fit into the bronsted lowry and lewis theories?
i kno that Bronsted-Lowry acids are defined as proton donors. (Protons are basically the same thing as positive hydrogen ions.) A Lewis acid though is defined as an electron pair acceptor.
For bases, Bronsted-Lowry bases are defined as proton acceptors, and Lewis bases are defined as electron pair donors.
I REALLY NEED HELP ! I DONT UNDERSTAND ANY OF THIS
we did a lab in school to determine water hardness by EDTA titration. I did three trials , first one require 38mL , 2nd - 50 and third-42 the question was to averge the volumes of EDTA used in the last two titrations and to calculate the moles of EDTA required for the titration. do u just averge the two volumes and multiply it by the molar concentraion of EDTA to get the moles?
and how do u calculate the molarity of metal ion present in the water sample? i kno that EDTA binds the metal ions in a 1 to 1 ratio.
and for the question above how can u change it to ppm Ca
also when there is a question asking to draw a lewis dot formula of EDTA and show the 6 electron pairs donated by the lewis , am i just supposed to draw the lewis structure?
how does the reaction of EDTA w/metal ions fit into the bronsted lowry and lewis theories?
i kno that Bronsted-Lowry acids are defined as proton donors. (Protons are basically the same thing as positive hydrogen ions.) A Lewis acid though is defined as an electron pair acceptor.
For bases, Bronsted-Lowry bases are defined as proton acceptors, and Lewis bases are defined as electron pair donors.
I REALLY NEED HELP ! I DONT UNDERSTAND ANY OF THIS