User Account

All Pages

titration help, Chemistry

Assignment Help:
During a titration with EDTA, using eriochrome black T as indicator to determine Ca
2+
, an
analyst obtained the following volumes of EDTA in three different trials: 5.01, 4.93 and 4.98
mL. What is the Ca
2+
concentration (mol/L) in this sample if the concentration of the EDTA
standard used was 0.035 mol/L, and the volume of sample titrated was 20.00 mL?
2) Considering the same type of experiment described in the previous question, calculate the
Ca
2+
concentration in a sample which consumes 20.05, 19.96 and 20.03 mL of a 0.0084 mol/L
EDTA solution in three different trials. In this case, the sample volume used was 15.00 mL.
3) What is the CaCO3 mass percentage in a seashell sample presenting 0.0158 g of this
compound for an initial sample mass of 0.0165 g?
Do not forget to report the correct number of significant figures. You may also want to use
the following equation in exercises 1 and 2: n = M x V, where n is the number of mols, M is
the molarity in mol/L, and V is the volume in L.

Related Discussions:- titration help

Acidity determination, 20ml of water sample requires 15ml of 0.1mg/l sodium...

20ml of water sample requires 15ml of 0.1mg/l sodium carbonate using phenolphthalein indicator. state the type of acidity and calculate the acidity

P- block elements, what are the chemical poperties of p-block elements ?

what are the chemical poperties of p-block elements ?

One of the following compound is ionic, Which one of the following compound...

Which one of the following compound is ionic: (1) KCl                             (2) CH 4               (3) Diamond              (4) H 2 Ans: KCl

D block elements, Why do Zr and Hf show similar properties?

Why do Zr and Hf show similar properties?

Shahid Abbas, diagonal relationship and anomalous behaviour of the each ele...

diagonal relationship and anomalous behaviour of the each element of the periodic table

Fundamentals of chemistry, difference between ion and free radicals ?

difference between ion and free radicals ?

Electrons present in all the p-orbitals, The total number of electrons pres...

The total number of electrons present in all the p-orbitals of bromine are: (1) Five          (2) Eighteen         (3) Seventeen           (4) Thirty five Ans: Seve

Comparison of alkyl cyanides and alkyl isocyanides, Test Ethyl c...

Test Ethyl cyanide Ethyl isocyanide Smell Strong but pleasant Extremely unpleasant Dipole moment

Convex lens, what is the graph between magnification and image distance for...

what is the graph between magnification and image distance for a convex lens..and how can we find the focal length for the lens using the graph?   Ans) The distance between the len

Who modified bohr''s theory by introducing elliptical orbits, Who modified ...

Who modified Bohr's theory by introducing elliptical orbits for electron path: (1) Hund (2) Thomson (3) Rutherford (4) Sommerfield Ans: Sommerfield

Write Your Message!

Captcha
Order Assignment

Featured Services

Order Now

Popular Subjects

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

Submit Assignment

Academics

Major Subjects

Majors

Get In Touch

whatsapp: +91-977-207-8620

Phone: +91-977-207-8620

Email: [email protected]

TERMS & POLICIES

HELP & SUPPORT

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd