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

Types of power sources - atomic emission spectrometry, Types of power sourc...

Types of power sources - atomic emission spectrometry: Three types of power sources have been employed in argon plasma spectroscopy accordingly; there are three different kind

Criteria of purity of organic compounds, Criteria of purity of organic comp...

Criteria of purity of organic compounds The purity of an organic compound can be determined by ascertaining its some physical constants such as m.p., b.p., defined gravity, re

The nucleus of tritium contains:, The nucleus of tritium contains: (1) ...

The nucleus of tritium contains: (1) 1 proton + 1 neutron                  (2) 1 proton + 3 neutron     (3) 1 proton + 0 neutron          (4)1 proton + 2 neutron An

Boron, why digonal relationship made

why digonal relationship made

Artificial sweetener - chemicals in food, Artificial sweetener: The art...

Artificial sweetener: The artificial sweeteners are other kind of food additives. The very firstly admired synthetic sweetener was saccharin. It was advertised like its water s

Define the phenomenon catenation, Carbon has maximum catenation ability. Th...

Carbon has maximum catenation ability. The self-linkage of the atoms of elements to make long chains is known as catenation.

Electrochemistry, Explain construction & working of calomel electrode.

Explain construction & working of calomel electrode.

The associated wave length, A 200g golf ball is moving with a speed of 5 m ...

A 200g golf ball is moving with a speed of 5 m per hour. The associated wave length (h = 6.625 x 10 -34 J sec)is: (1) 10- 1 0 m                        (2) 10 -20 m

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