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

Naming complex substituents - iupac system of nomenclature, Naming complex ...

Naming complex substituents - IUPAC system of nomenclature If the substituent on the parent chain is complex ( that is it is branched) it is termed as substituted alkyl g

Fehlings test, what is fehlings test and its reagent?

what is fehlings test and its reagent?

Formaldehyde, Ask question formaldehyde reacts with NH3 #Minimum 100 words ...

Ask question formaldehyde reacts with NH3 #Minimum 100 words accepted#

Conformation energy profile for butane c2-c3 bond rotation, Conformation en...

Conformation energy profile for butane Conformation energy profile for butane C2-C3 bond rotation

PTLC, HOW TO PREPARE PTLC

HOW TO PREPARE PTLC

Electricity, when will conductors conduct electricity?

when will conductors conduct electricity?

Density theory, The assignment is basically concerned with the writing of a...

The assignment is basically concerned with the writing of a number of functions which can implement the density theory described above. These functions will then be called by a pro

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