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

Lipids - biomolecules, Lipids Lipids are constituents of plants and tis...

Lipids Lipids are constituents of plants and tissues that are insoluble in water although soluble in organic solvents like ether, carbon tetrachloride, chloroform, or benzene.

Organic chemistry , what is made when resorsinol reacts with zinc powder?

what is made when resorsinol reacts with zinc powder?

What are trioxides, Q. What are Trioxides? The selenium and tellurium t...

Q. What are Trioxides? The selenium and tellurium trioxides are not stable, SO 2 , is the only important trioxide in the group. Its preparation has been described above. Sul

Nomenclature of bicyclic compounds, Nomenclature of Bicyclic compounds ...

Nomenclature of Bicyclic compounds Several hydrocarbons and their derivatives include two fused or bridged rings. The carbon atoms are common to both rings are known as bridge

Calculate the value of the rydberg constant, Positronium consists of an ele...

Positronium consists of an electron and a positron (a particle which has the same mass as an electron, but opposite charge) orbiting round their common centre of mass. Calculate th

#alkyenes, reactions for preparation of westron

reactions for preparation of westron

S block elements, why are salts of alkali metals diamagnetic

why are salts of alkali metals diamagnetic

General anesthetics - drugs and medicines, General Anesthetics: Genera...

General Anesthetics: General Anesthetics depress the central nervous system to like an extent that all sensitivity to pain or feeling is gone, that is they make unconsciousnes

Benzylic halide undergo sn1 or sn2 mechanism , Will benzylic halide undergo...

Will benzylic halide undergo SN1 or SN2 mechanism ?Why? Ans) Benzyl chloride is a  primary alkyl halide and undergo SN2 rapidly.

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