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

Draw a typical triglyceride, Draw a  typical triglyceride and name its bui...

Draw a  typical triglyceride and name its building blocks. Mark centres of chirality.   The reaction cascade exact to fatty acid degradation is called "β-oxidation". It take

Substances, who created or found Styrene

who created or found Styrene

Sequence of amino acids histidine-glutamine-lysine in buffer, In lab, you'r...

In lab, you're having fun along with buffers based onto a 0.1 M solution of sodium phosphate at pH7.0.  Into this system, there are three of pK A s as:  12.7, 7.21 and 2.12.

Zeolite process, discuss the principle of zeolite process with chemical equ...

discuss the principle of zeolite process with chemical equation

Illutrate integrated rate law, (i) Illutrate integrated rate law and derive...

(i) Illutrate integrated rate law and derive it for first order reaction.  (ii) Why coal does not burn by itself in air but once initiated by flame, it continues to burn?

100 questions, The mass of CaCl2 (molar mass= 111.0) required to prepare 75...

The mass of CaCl2 (molar mass= 111.0) required to prepare 75.00 milliliters of a 2.000 molar solution of this salt is?

Reactions of alkaline earth metals with oxygen, Reactions of Alkaline earth...

Reactions of Alkaline earth metals with oxygen: Write the reactions of any two elements of group II A with oxygen. Ans. Alkaline earth metals react with oxygen to form corr

Bohr''s model of the hydrogen atom, Which of the following statements does ...

Which of the following statements does not form part of Bohr's model of the hydrogen atom: (1) Energy of the electrons in the orbit is quantized (2) The electron in the orbi

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