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

Which of the following sets quantum number is not possible, Which of the fo...

Which of the following sets of quantum number is not possible: (1) n=3, l=+2, m=0,and s = +1/2     (2) n=3, l=0, m=0,and s = -1/2     (3) n=3, l=0, m=-1,and s = +1/2

Mass Number, What is meant by ''mass number''

What is meant by ''mass number''

Valency shell electronic configuration, The atomic number of an element hav...

The atomic number of an element having the valency shell electronic configuration 4s 2 4p 6   is: (1) 35      (2) 36     (3) 37     (4) 38 Ans: 35

Production of ammonia, Q. How to prepare ammonia in industrial level? ...

Q. How to prepare ammonia in industrial level? Ans. Production of Ammonia Ammonia, NH 3 , can be prepared by adding a strong alkali metal (such as sodium) to an ammon

Extraction of metals, what are the principle underlying the extraction of m...

what are the principle underlying the extraction of metals

Compute the kerosene - water ratio to remove nicotine, One step in the prep...

One step in the preparation of nicotine sulfate from tobacco is the extraction of nicotine from aqueous solution by kerosene.  The table below shows equilibrium data for the distri

Physical, Ask quschrodinger wave equationestion #Minimum 100 words accepted...

Ask quschrodinger wave equationestion #Minimum 100 words accepted#

Determine electron that has the quantum numbers, Which of the following st...

Which of the following statements is not correct for an electron that has the quantum numbers n=4   and m =2: (1)  The electron may have the quantum number s= +1/2 (2) The e

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