2. a 50 ml solution containing 0.10 m 1-naphtoic acid (pka = 3.70)

Want answers to the assignment Below?

Text or Whatsapp Olivia at +1 (307) 209-4351


 

Place your order today at a 20% discount

2.  A 50 mL solution containing 0.10 M 1-Naphtoic acid (pKa = 3.70) and 0.15 M arsenic acid (pKa1 = 2.24; pKa2 = 6.96) is titrated with 0.20 M KOH.
(a)    How many end points will be observed?
(b)   What is the pH of the solution before adding any KOH?
(c)    Calculate the volume of KOH required to reach the first equivalence point.
(d)   Calculate the pH after the addition of 100 mL of KOH (assume that the OH–contribution from water autoprotolysis is negligible).
 
3.  Masking of Cu2+ can be achieved by reduction to Cu+.  A 25.00 mL aliquot of a solution containing Cu2+ and Ni2+ was treated with ascorbic acid at pH 3.0 to reduce the Cu2+ ions.  The pH was adjusted to 10.0 and 27.32 mL of 0.0565 M EDTA was required to reach a murexide end point.  In a parallel titration, 40.45 mL of 0.0565 M EDTA was required to reach the murexide end point in a 25.00 mL aliquot that was not treated with ascorbic acid.  What amounts of copper and nickel in ppt (mass/vol.) were in the original solution?

Don't use plagiarized sources. Get Your Custom Essay on
2. a 50 ml solution containing 0.10 m 1-naphtoic acid (pka = 3.70)
From Just $13/Page
Order Essay

ORDER ASSIGNMENT

About ASAP Essays

We are a professional paper writing website. If you have searched a question and bumped into our website just know you are in the right place to get help in your coursework. We offer HIGH QUALITY & PLAGIARISM FREE Papers.

How It Works

To make an Order you only need to click on “Order Now” and we will direct you to our Order Page. Fill Our Order Form with all your assignment instructions. Select your deadline and pay for your paper. You will get it few hours before your set deadline.

Are there Discounts?

All new clients are eligible for 20% off in their first Order. Our payment method is safe and secure.

Hire a tutor today CLICK HERE to make your first order

CLICK HERE  To order your paper

About ASAP ESSAYS writing service

We are a professional paper writing website. If you have searched a question and bumped into our website just know you are in the right place to get help in your coursework. We offer HIGH QUALITY & PLAGIARISM FREE Papers.

How It Works

To make an Order you only need to click on “Order Now” and we will direct you to our Order Page. Fill Our Order Form with all your assignment instructions. Select your deadline and pay for your paper. You will get it few hours before your set deadline.

Are there Discounts?

All new clients are eligible for upto 20% off in their first Order. Our payment method is safe and secure.

CLICK HERE  To order your paper

Order your Assignment today and save 15% with the discount code ESSAYHELP

X