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

An ion has 18 electrons in the outermost shell, An ion has 18 electrons in ...

An ion has 18 electrons in the outermost shell, it is: (1)  Cu +                (2) Th 4+                             (3) Cs +                       (4) K + Ans

What is geometrical isomers, Q. What is Geometrical isomers? Let us tak...

Q. What is Geometrical isomers? Let us take one final example of Ma 2 b 2 cd where the following five isomers are possible as shown in Fig. 'When writing the geometrica

Kmno4, Why the kmno4 is colored.?

Why the kmno4 is colored.?

Solid state, How does crystallography help in study of crystal structure

How does crystallography help in study of crystal structure

All electrons on the 4p sub-shell must be characterized, All electrons on ...

All electrons on the 4p  sub-shell must be characterized by the quantum number(s): (1)  n=4, m= 0, s= ± 1/2                (2) l=1    (3)  l=0, s= ± 1/2

Buffer.., Why is it important to know pka of a buffer

Why is it important to know pka of a buffer

Determine the overall efficiency, A one serving bag of Granny Goose Hawaiia...

A one serving bag of Granny Goose Hawaiian Style Potato Chips has 70 Cal. Considering that all of the energy from eating these chips goes toward keeping your heart beating, how lon

Thermodynamics, What are the limitations of second law of thermodynamics?

What are the limitations of second law of thermodynamics?

Write Your Message!

Captcha
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!

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