User Account

All Pages

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

Periodic, where is the asterisk located

where is the asterisk located

Organic chemistry, perkin ring clousre reaction

perkin ring clousre reaction

Acs exam, acs exam

acs exam

Molar concentration of a saturated solution, The K sp of the phosphate fer...

The K sp of the phosphate fertilizer CaHPO 4 .2 H2O is 2.7 x 10 -7 at 25 o C.  What is the molar concentration of a saturated solution?  What mass of this compound will dissolve

Hardness of water explain various units and their relationsh, maxmium 500 w...

maxmium 500 words

Indicators , what are the diferent types of indicators and describe them

what are the diferent types of indicators and describe them

Equlant mass, find the equlant mass of 2M HCL?

find the equlant mass of 2M HCL?

Can lialh4 be used to reduce nitro group to amino group?, YES,LiAlH 4 be u...

YES,LiAlH 4 be used to reduce nitro group to amino group in hydrogenation

The ratio of the energy of a photon & wavelength radiation, The ratio of th...

The ratio of the energy of a photon of 2000Å  wavelength radiation to that of 4000 Å    radiation is: (1) 1/4           (2) 4       (3) 1/2              (4) 2 Ans

Equivalent weight, how to find equivalent weight of a molicule

how to find equivalent weight of a molicule

Write Your Message!

Captcha
Order Assignment

Featured Services

Order Now

Popular Subjects

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!

Submit Assignment

Academics

Major Subjects

Majors

Get In Touch

whatsapp: +91-977-207-8620

Phone: +91-977-207-8620

Email: [email protected]

TERMS & POLICIES

HELP & SUPPORT

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd