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

Explain bulking of sand, Explain Bulking of sand The presence of moistu...

Explain Bulking of sand The presence of moisture content to particular extent in sand increases the volume of sand. This is due to the fact that the moisture causes ?lm of wate

The maximum number of unpaired electrons, Which of the following has the ma...

Which of the following has the maximum number of unpaired electrons: (1)  Mg 2+                              (2) Ti 3+          (3) V 3+                             (

Explain chemistry changes of food deterioration, Chemical Changes Duri...

Chemical Changes During the processing and storage of foods, several chemical changes occur that involve the internal food components and the external environmental factors. T

Which has highest second ionisation energy, Which has highest second ionisa...

Which has highest second ionisation energy? Electronic config of Na(+) is noble gas config. . so its very difficult to remove an electron so it will have very high 2nd ionisati

Conversions, Conversion of phenol to salicyclic acid

Conversion of phenol to salicyclic acid

Subliamtion, By who can sublimation be useful? How can it be useful?

By who can sublimation be useful? How can it be useful?

#title., i just need to know if anyone that might know of a website that ha...

i just need to know if anyone that might know of a website that has the answer key to the book chemistry Prentice Hall Brief Review 2013

Determine the wavelength of the light, If change in energy (ΔE) = 3x 10 -8...

If change in energy (ΔE) = 3x 10 -8 j, h= 6.64x 10 -34 j-s  and c= 3x 10 8 m/s  then wavelength of the light is: (1) 6.36x 10 3 Å                 (2) 6.36x 10 5 Å

Ethanol or ethyl alcohol, Ethanol or Ethyl alcohol This is obtained by ...

Ethanol or Ethyl alcohol This is obtained by the fermentation of Molasses in the presence of enzymes as catalyst. C12H22O11+H2O→C6H12O6 + C6H12O6        (sugar)

Atoms, what are atoms made of ?

what are atoms made of ?

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