Sunday
November 23, 2014

Homework Help: P. Chemistry

Posted by Mark on Tuesday, February 23, 2010 at 5:32pm.

A student added solid K2O to a 750.0 mL volumetric flask. The solid was dissolved in water and then the flask filled with water to the mark. This formed 750.0 mL of the initial KOH solution. 20.0 mL of the initial solution was transferred to another flask and diluted to 200.0 mL. The pH of the diluted solution was 14.22.

(a) What is the concentration of hydroxide ion is the diluted solution?
M ***found this to be 1.66M

(b) What is the concentration of hydroxide ion in the original solution?
M

(c) What mass of K2O was added to the first flask?

not sure how to do the last two parts....

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

Physical Chem - A student added solid K2O to a 750.0 mL volumetric flask. The ...
Chemistry - Preparing solutions a. A solution was prepared by dissolving 5.65 g ...
chemistry - To a 100 mL volumetric flask were added 5.00 mL of 6.0 M NH3 , 14.5g...
chemistry - Mass of Aspirin tablet: 0.357 g 10 mL of 1 M NaOH was added to the ...
Chemistry - Science (Dr. Bob222) - A student wanted to determine the amount of ...
College Gen.Chemistry - A student wanted to determine the amount of copper in a...
Chemistry - In a similar experiment, a student needs a 0.50 M KOH solution (MM...
College Chemistry - A student placed 14.0g of glucose (C6H1206) in a volumetric ...
College Chemistry - A student placed 14.0g of glucose (C6H1206) in a volumetric ...
College Chemistry - A student placed 14.0g of glucose (C6H1206) in a volumetric ...

Search
Members