56 208
Assignments Done
99,1%
Successfully Done
In January 2018
Your physics homework can be a real challenge, and the due date can be really close — feel free to use our assistance and get the desired result.
Be sure that math assignments completed by our experts will be error-free and done according to your instructions specified in the submitted order form.
Our experts will gladly share their knowledge and help you with programming homework. Keep up with the world’s newest programming trends.

Answer on Inorganic Chemistry Question for Lena

Question #27512
Determine if HNO3 can dissolve in the following metal:

1) Write a balanced chemical reaction showing how the 2.09g Cu dissolves in HNO3.

I had put down: Cu(s) + 4HNO3(aq) ——> Cu(NO3)2(aq) + 2NO2(g) + 2H2O(l)
but it's wrong.

2) Determine the minimum volume of 6.3M HNO3 required to completely dissolve the sample (in mL).

Thank you!!
Expert's answer
The reaction of copper metal with a dilute nitric acid will take place according to the following equation:
3Cu(s) + 8HNO3(aq) ——> 3Cu(NO3)(aq) + 2NO(g) + 4H2O(l)

To calculate the amount of material we need copper:

n(Cu) = 2.09 g / 64 g/mol
n(Cu) = 0.0326 mol
n(NO) = (n(Cu)*3) / 2
n(NO) = 0.049 mol

The quantity of substance with nitric acid, we can calculate on the basis of the following:

2) n(HNO3) = 8n(Cu)/3
n(HNO3) = 8*0.0326 mol/3 = 0.087 mol
V = Cm*n
V(HNO3) = 6.3 mol/L * 0.087 mol = 0.547 L
V(HNO3) = 547 mL
Answer:
V(HNO3) = 547 mL

Need a fast expert's response?

Submit order

and get a quick answer at the best price

for any assignment or question with DETAILED EXPLANATIONS!

Comments

No comments. Be first!

Leave a comment

Ask Your question