Submission of Proposal under Star College Scheme

Project: 5
Aim:
To determine gravimetrically loss in weight of mild steel samples in 3 M and 6 M Hydrochloric acid


Requirements:
Mild steel sample, Hydrochloric acid(3 M and 6 M),Acetone etc.


Procedure:

1. 
   The two mild steel samples were washed with distilled water then with acetone and clean with cotton.
   
2. 
   Weigh the samples accurately.
   
3. 
   Both the weighed samples kept in separate test tubes containing 5 ml of 3M and 5 ml Of 6 M HCl respectively for two hours.
   
4. 
   After two hours the samples were taken out wash with water clean with cotton and weighed accurately.
   

Observation:

samples	Weight of samples
	Before keeping in HCl	After keeping in HCl
A	__________ g	________g in 3M HCl
B	__________ g	________ g in 6M HCl

Calculation:

1. 
   For 3M HCl:
   

1. 
   Loss in weight of sample A = (weight of sample ‘A’ before keeping in 3M HCl - weight of sample ‘A’ after keeping in 3M HCl )
   

2. 
   % loss in weight in 3M HCl = ­­­ loss in weight ×100
   

Weight of sample ‘A’ before keeping in HCl

2. 
   For 6M HCl:
   

3. 
   Loss in weight of sample B = (weight of sample ‘B’ before keeping in 6M HCl - weight of sample ‘B’ after keeping in 3M HCl )
   

4. 
   % loss in weight in 6M HCl = loss in weight ×100
   

Weight of sample ‘B’ before keeping in HCl
Result:

1. 
   loss in weight :
   

1. 
   For 3M HCl = _______g
   
2. 
   For 6M HCl = _______g
   

2. 
   %loss in weight :
   

3. 
   For 3M HCl = _______%
   
4. 
   For 6M HCl = _______%