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

Finding volume with molarity, If you have 250 mL of 2 M sodium sulfate dilu...

If you have 250 mL of 2 M sodium sulfate diluted to make 0.500 M of sodium sulfate, how would you figure out the volume?

..EMF, proper definition plz

proper definition plz

Isolation of important transition metals, Q. Show the Isolation of Importan...

Q. Show the Isolation of Important Transition Metals? Involved in the extraction of metals. Describe the extraction of important transition metals of the first transition serie

Electronic displacements in a covalent bond, Write a sort note electronic d...

Write a sort note electronic displacements in a covalent bond ?

What are the primary source of energy, Q. What are the primary source of en...

Q. What are the primary source of energy ? Oils and fats form an integral part of the dietaries the world over. In the body they are the primary source of energy. As you know,

Chemical properties of alkyl halides, Chemical Properties of Alkyl Halides ...

Chemical Properties of Alkyl Halides The alkyl halides are very reactive; the sequence of reactivity is as follow:             Iodide > Bromide > Chloride (Nature of the hal

The mole concept, The mole (calculation using the mole formula should be in...

The mole (calculation using the mole formula should be included).

Alkyl groups - iupac system of naming organic compounds, Alkyl groups - IUP...

Alkyl groups - IUPAC System of Naming Organic Compounds These groups involves one hydrogen atom less as compared to the alkane. These groups are named by substituting the suff

How will you synthasize benzylamide from aniline? , 1)Aniline is more basic...

1)Aniline is more basic because of the strong electron withdrawing effect of the carbonyl oxygen on the amide of acetanilide. 2)Aniline is more basic because of  the strong electro

What are fat soluble vitamins, Question 1 Write a short note on the follow...

Question 1 Write a short note on the following Hydrophobic interaction Sphingolipids Steroid hormones Enzyme specificity Question 2 Define and classify amin

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