What is the normality of the following solution?
Consider the following unbalanced redox reaction:
#Cr_2O_7^(2-)+Fe^(2+)+H^+rarr Cr^(3+)+Fe^(3+) +H_2O#
What is the normality of a #K_2Cr_2O_7# solution, 35.0 #cm^3# of which contains 3.87g of #K_2Cr_2O_7#
I am struggling to work out the equivalent weight. I have no idea how to get it.
Consider the following unbalanced redox reaction:
What is the normality of a
I am struggling to work out the equivalent weight. I have no idea how to get it.
1 Answer
Well, by definition,
Explanation:
And so...
And so
As regards equivalence, we need to write the appropriate redox reaction, for which we use the method of half-equations...
Orange dichromate,
And
And clearly, to balance, we take
Now you have the molar equivalence of
Does this help you?