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

IR spectrum, Draw the IR spectra of pyridine

Draw the IR spectra of pyridine

Acidity of aromatic caroxylic acids, properties and effects

properties and effects

NICOTINE TEST, how do we estimate nicotine in tobacco qualitatively in lab ...

how do we estimate nicotine in tobacco qualitatively in lab by simple chemical test?

Illustrate metallic bonding, Q. Illustrate Metallic Bonding? Ans. ...

Q. Illustrate Metallic Bonding? Ans. A metal is crystalline because it has a regularly repeating, closely packed structure. In a metal, though, this closely packed structu

2) Organic Chemistry, westron

westron

ORGANIS CHEM, equation for the reaction of phosphate ions and ammonium moly...

equation for the reaction of phosphate ions and ammonium molybdate solution in test for phosphorous in lassaignes test

Minerals and their formulae, list of minerals with symbol

list of minerals with symbol

Trace and ultratrace analysis, Trace and ultratrace analysis: The accu...

Trace and ultratrace analysis: The accuracy, precision and detection limits of flame AAS depend on how the analyte sample is introduced into the atomiser. We need to transfer

Determine how many pounds of feed are required, A water solution contains 6...

A water solution contains 64% Na 2 S 2 O 2 together with 1.0% soluble impurity. Upon cooling to 5°C, Na 2 S 2 O 2 ·5H 2 O. crystallizes out. The solubility of this hydrate is 1.35

Spdf, how to solve the spdf i don''t understand

how to solve the spdf i don''t understand

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