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

Considered as the main postulate of bohr''s model of atom, Which one of the...

Which one of the following is considered as the main postulate of Bohr's model of atom: (1) Protons are present in the nucleus  (2) Electrons are revolving around the nucleu

#10.., #Classify each reaction and give the name of all the chemical formul...

#Classify each reaction and give the name of all the chemical formula..

Show experimental observations of werners theory, Q. Show Experimental obse...

Q. Show Experimental observations of werners theory? Werner showed that his postulates are consistent with experimental observations. He made use of basically three kinds of ex

Electron migration effects, what is electronic displacements?

what is electronic displacements?

Define ionisation isomerism, Q. Define Ionisation Isomerism? Ionisatio...

Q. Define Ionisation Isomerism? Ionisation Isomerism: when coordinated ions exchange positions with ions present in the lattice position, we get ionisation isomers. Thus comp

Benzoic acid, benzoic acid from benzene.i can''t see it clearly

benzoic acid from benzene.i can''t see it clearly

Physical properties of maleic acid and fumaric acid, Physical Properties of...

Physical Properties of Maleic Acid and Fumaric Acid (i) Maleic Acid and Fumaric Acid Both are colourless crystalline solids. They both are soluble in water. (ii) The melting

Chemical bonding, how does chemical bonding takes place?

how does chemical bonding takes place?

Determine the formula of the compound, A compound is prepared by two elemen...

A compound is prepared by two elements N and M. The element N forms ccp structure and atoms of M occupy 1/3rd of tetrahedral voids. Determine the formula of the compound ?

Explain the natural environmental system, Question 1: (i) With the aid...

Question 1: (i) With the aid of a diagram, briefly explain the natural environmental system. (ii) Explain the green house effect, and give 2 examples of green house gases

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