what is the required amount of con hcl needed to prepare 100ml of w/v dilute Hcl? strenth of Hcl 36.5 w/w and is specific gravity is 1.17
To determine the required amount of concentrated HCl needed to prepare 100ml of a w/v (weight/volume) dilute HCl solution, we need to consider the strength of the HCl and its specific gravity.
1. Determine the required concentration of the dilute HCl solution:
The strength of HCl is given as 36.5% w/w (weight/weight). This means that the solution contains 36.5 grams of HCl per 100 grams of solution.
2. Convert the w/w concentration to w/v concentration:
Since we want a w/v dilute HCl solution, we need to convert the w/w concentration to w/v concentration. To do this, we divide the weight of HCl by the volume of the solution and multiply by 100.
(36.5g HCl / 100g solution) * 100 = 36.5% w/v HCl
3. Determine the density (specific gravity) of the HCl solution:
The specific gravity of a substance is the ratio of its density to the density of water. In this case, the specific gravity of the HCl solution is given as 1.17.
4. Calculate the required amount of HCl:
To calculate the required amount of concentrated HCl needed, we use the formula:
Mass of HCl = (Volume of solution * Desired concentration * Specific gravity) / 100
Mass of HCl = (100ml * 36.5% * 1.17) / 100
Mass of HCl = 42.705 grams
Therefore, you will need approximately 42.705 grams of concentrated HCl to prepare 100ml of a w/v dilute HCl solution with a strength of 36.5% w/w and a specific gravity of 1.17.