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

Chemical bonding, When NaCl is dissolved in water, the sodium ion become

When NaCl is dissolved in water, the sodium ion become

Functions of nucleic acid - biomolecules, Functions of nucleic acid: N...

Functions of nucleic acid: Nucleic acid has two major functions (a) Replication and (b) Protein synthesis.

Physical chemistry, conductometric titratins : weak base within a weak acid...

conductometric titratins : weak base within a weak acid

Determine number of orbitals containing electron pairs, The atomic number o...

The atomic number of an element is 17. The number of orbitals containing electron pairs in its valence shell is: (1) Eight                (2) Six          (3) Three

Evaportion, Evaporation theory and describe advantages, disadvantages and a...

Evaporation theory and describe advantages, disadvantages and application?

2-naphthol, What are two factors that contribute to the acidity of 2-naphth...

What are two factors that contribute to the acidity of 2-naphthol

Scary Density Situation, The density of pure silver is 10.5 g/cm^3 at 20C....

The density of pure silver is 10.5 g/cm^3 at 20C. If 5.25g of pure silver pellets is added to a graduated cylinder containing 11.2 mL of water, to what volume level will the water

#titlespontaneous and non spontaneous reactions, give me assigment of spont...

give me assigment of spontaneous and non spontaneous reactions

Salt analysis., CAN I PLEASE GET A SALT ANALYSIS CHART FOR MY CHEMISTRY PRA...

CAN I PLEASE GET A SALT ANALYSIS CHART FOR MY CHEMISTRY PRACTICALS?

Organic, convert benzene to benzaldehyde

convert benzene to benzaldehyde

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