Thursday
April 2, 2015

Homework Help: chemistry

Posted by dr bob's number one fan on Thursday, November 15, 2012 at 12:37am.

How to find moles given oxidation numbers and chemical formula?
Trying to do my chemistry lab but i'm super duper stuck. please help me i'm gonna die. this is the part i'm stuck on:

The overall charge on the complex, [Ni(en)(H2O)]^2+ * SO4^2- * H2O is zero; the charge on sulfate ion is 2-;en and water ligands both have a charge of zero; and nickel has a charge of 2+. Using this information and your previous experimental results, calculate the number of moles of SO4^2- in 100 grams of your complex and the mass percent of SO4^2- in your complex.


previous experimental results:
Molarity of Ni^2+ in unknown sample: 0.0647M
Moles of Ni^2+ in 100 g of complex: 0.475 moles
Mass % of Ni^2+ in complex: 27.86%

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

Chemistry - Sorry to post again but I'm really stuck on this one! I'm doing ...
Chemistry - Please help me with this chemistry question? I am working on a lab ...
chemistry - I am trying to answer a bunch of lab questions about a lab I did and...
Chemistry - I'm doing some post lab questions and I'm stuck on one. In lab we ...
Ap Chemistry - I'm doing the calculations on the lab "Oxidizing Power of Laundry...
Chemistry - Can someone please help me on this two Chemistry questions...they ...
MOLARITY QUESTION - I am trying to answer a bunch of lab questions about a lab I...
chemistry - now am stuck on how to find the grams of X+Y=1.10 X for glucose and ...
Chemistry - Stuck on this because I haven't done chemistry in a while. Can ...
Honors Chemistry - We did a lab in class on Friday where we stuck a metal loop ...

Members