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

Thermodynamics, Calculate the free energy change of following reaction at29...

Calculate the free energy change of following reaction at298 kelvin H2+I2=2HI if the enthalpy change is 51.8816kj and the entropy change is 166.15j is this reaction thermodyanamica

The allylic carbons, The allylic carbons are indicated with an asterisk (*...

The allylic carbons are indicated with an asterisk (*).

Equivalent weight, how to calculate equivalent weight of given substance? l...

how to calculate equivalent weight of given substance? like K2C2O2.H2O

Lanthanides and actinides, why YbS and YbI2 are semiconducting solids but L...

why YbS and YbI2 are semiconducting solids but LaS and LaI2 show metallic character..

Polymers, giving correct formulas give the reactantsand products in the for...

giving correct formulas give the reactantsand products in the formation of poly2 butane

Balancing equation, I need to find the balanced formula for calcium hydroxi...

I need to find the balanced formula for calcium hydroxide + potassium carbonatequestion..

The following compound has electrovalent linkage, Which of the following co...

Which of the following compound has electrovalent linkage: (1)  CH 3 Cl                                                   (2)  Nacl             (3)  CH 4

Name the plant based sources of antioxidants, Q. Name the plant based sourc...

Q. Name the plant based sources of antioxidants? Name the plant based sources of the following antioxidants: Vitamin C, lycopene, isoflavones and organo sulphur compounds.

Electrochemical cells and series, difference between electrochemical cells...

difference between electrochemical cells and electrochemical series

The following set of quantum numbers is possible, Which of the following se...

Which of the following set of quantum numbers is possible: (1) n=3, l=2, m=2,and s = +1/2  (2) n=3, l=4, m=0,and s = -1/2            (3) n=3, l=2, m=2,and s = +1/2  (4

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