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

Infrared spectroscopy, how we determine the compound is ir active or not . ...

how we determine the compound is ir active or not . and how we determine the polarity of a compound?

Help, While studying evolution, a student comes across a cladogram that inc...

While studying evolution, a student comes across a cladogram that includes clades like amphibia, reptilia, aves, and mammalia. What must be the basal clade?

Which elements is a covalently bonded crystal, Name the Which is a covalent...

Name the Which is a covalently bonded crystal? germanium

There is no difference between a2p and a 3p orbital, There is no differe...

There is no difference between a2p and a 3p  orbital regarding: (1) Shape (2)Size (3)Energy (4) Value of Ans: Shape

D block elements , explain why Cu2+ ion is not stable in aqueous solution?

explain why Cu2+ ion is not stable in aqueous solution?

Zone refining, explain zone refining method of purification of silicon

explain zone refining method of purification of silicon

Explain bonding molecular orbital, Explain bonding molecular orbital Th...

Explain bonding molecular orbital The bonding molecular orbital is derived by the constructive "side-to-side" overlap of peaks with peaks and troughs with troughs. The antibond

DIENES, PREPARATIONS OF DIENES

PREPARATIONS OF DIENES

Purification and characterisation of acetone , What is this characterisatio...

What is this characterisation all about?and how do you do it using DNPH?

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