April 16, 2014

Homework Help: chemistry

Posted by fenerbahce on Sunday, July 15, 2012 at 7:53pm.

Run # Volume NaOH used (mL)
1 4.1
2 4.3
3 2.8

Concentraion of NaOH: 0.113 M

pH of acid: 2.84

the questions are:

#moles of NaOH: ?
initial acid concentration: ?
Determine the Ka and pka of the weak acid: ?

So here is what I did:

Shaked for several minutes about 1 g of the acid with 120 ml of distilled water. Filtered the solution into a clean beaker. Determined the concentration of the acid in the filtrate by pipetting a 25 ml aliquot into a clean flask and titrating it with 0.1 M sodium hydroxide.

Placed about 30 ml of the acid solution from part a in a 50 ml polystyrene breaker and found its ph using a ph meter.

Answer this Question

First Name:
School Subject:

Related Questions

chemistry - Can you help me with the following: Calculate hte pH that results ...
Chemistry - Molarity of NaOH solution = 0.06115 Volume of NaOH used = 15.50 mL ...
Chemistry - Find the concentration of the polyprotic weak acid given the ...
Chemistry - Find the concentration of the polyprotic weak acid given the ...
chemistry - acid: HCI 0.10 M Base:NaOH O.050 M 3 ml of HCI was used. Calculate ...
Chemistry - A sample of 1.029g of KC8H5O4 was titrated with an NAOH solution of ...
chemistry, please help! - Given: 1. Mass of oxalic acid + weighing paper 2.0355g...
chemistry - The following data were collected at the endpoint of a titration ...
chemistry - What volume of WATER MUST BE ADDED to 10.0 mL of 6.0 M NaOH to make ...
chemistry - Mass of tablet is 1.3183g, concentration of HCl 0.1807M, ...