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

Percentage concentration, percentage concentration of 18-k gold bracelet, 1...

percentage concentration of 18-k gold bracelet, 150 grams

Conversion, convert n-propyl alcohol to iso propyl alcohol

convert n-propyl alcohol to iso propyl alcohol

GFAAS, GFAAS is often necessary to add modifiers in order to increase the s...

GFAAS is often necessary to add modifiers in order to increase the sensitivity of the techniques.Giving example explain the principles used in the selection of such modifiers,be ca

An e - has magnetic quantum number, An e - has magnetic quantum number as 3...

An e - has magnetic quantum number as 3, what is its principal quantum number: (1) 1        (2) 2    (3) 3            (4) 4 Ans: 4

Determine the overall efficiency, A one serving bag of Granny Goose Hawaiia...

A one serving bag of Granny Goose Hawaiian Style Potato Chips has 70 Cal. Considering that all of the energy from eating these chips goes toward keeping your heart beating, how lon

Organic, show how you would sythesise the following compounds, starting wit...

show how you would sythesise the following compounds, starting with benzene or toluene and any necessary acyclic reagents. Assume para is the major product.

Show the applications in bioinorganic chemistry, Q. Show the applications i...

Q. Show the applications in Bioinorganic chemistry? Bioinorganic chemistry or the study of the role of metal ions in biological cycles is mainly the study of some typical metal

Chemical reactions, how do I come up with a chemical reaction problem for t...

how do I come up with a chemical reaction problem for the human body

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