How do I prepare 100mL of 10g/L HCl from concentrated HCl(37%HCl, density 1.19g/mL) Is it 2.28mL of conc HCl dilute to 100mL with water? Please show the calculation steps.
Yes, you can prepare 100mL of 10g/L HCl from concentrated HCl (37%HCl, density 1.19g/mL) by using 2.28mL of conc HCl and diluting it to 100mL with water.
Calculation steps:
1. Calculate the mass of HCl in 2.28mL of concentrated HCl:
Mass of HCl = Volume of HCl x Density of HCl
Mass of HCl = 2.28mL x 1.19g/mL
Mass of HCl = 2.7132g
2. Calculate the required concentration of HCl:
Required concentration of HCl = Desired mass of HCl/Volume of solution
Required concentration of HCl = 10g/100mL
3. Calculate the volume of concentrated HCl needed:
Volume of concentrated HCl = Desired mass of HCl/Required concentration of HCl
Volume of concentrated HCl = 10g/10g/L
Volume of concentrated HCl = 2.28mL
To prepare 100mL of a 10g/L HCl solution from concentrated HCl (37% HCl, density 1.19g/mL), here are the steps:
1. Determine the amount of HCl needed:
- The concentration of the final solution is 10g/L, so 100mL of the solution contains 10g of HCl.
- Therefore, you need 10g of HCl for the 100mL solution.
2. Calculate the volume of concentrated HCl required:
- The density of the concentrated HCl is 1.19g/mL, which means that 1mL of the solution weighs 1.19g.
- To find the volume of concentrated HCl needed to obtain 10g, divide 10g by the density:
Volume = mass / density = 10g / 1.19g/mL
- This gives us the required volume in mL.
3. Convert the volume to mL to convert it to the required concentration:
- The concentration of the concentrated HCl is 37% (or 37g/100mL), which means that 100mL of the solution contains 37g of HCl.
- Therefore, to obtain 10g of HCl, divide 10g by 37g and multiply by 100mL:
Volume = (10g / 37g) * 100mL = 27.03mL
4. Dilute the concentrated HCl with water:
- Take 2.28mL of the concentrated HCl and dilute it to a total volume of 100mL using water.
Therefore, the correct calculation shows that you need to take 27.03mL of concentrated HCl and dilute it to a total volume of 100mL with water to prepare 100mL of a 10g/L HCl solution.
To prepare 100mL of a 10g/L solution of HCl from concentrated HCl (37% HCl, density 1.19g/mL), you can follow these steps:
Step 1: Determine the amount of concentrated HCl needed.
The concentration of the concentrated HCl is given as 37%. We need to convert this to grams per mL in order to calculate the required volume.
37% HCl means that there are 37g HCl in 100mL of concentrated HCl. So, the concentration is 37g/100mL.
To calculate the amount of HCl needed for 10g/L solution, we can use the formula:
(g HCl) / (mL concentrated HCl) = (g/L Molarity required) / (mL solution)
Plugging in the values, we have:
(37g HCl) / (100mL concentrated HCl) = (10g/L) / (100mL solution)
Step 2: Calculate the required volume of concentrated HCl.
Rearranging the formula, we find:
mL concentrated HCl = (37g HCl) * (100mL solution) / (10g/L)
Plugging in the values, we get:
mL concentrated HCl = (37g) * (100mL) / (10g/L)
mL concentrated HCl = 370 mL
Therefore, we need 370 mL of concentrated HCl to prepare the 10g/L HCl solution.
Step 3: Calculate the volume of water required.
To prepare the 100mL solution, the volume of water needed is given by:
Volume of water = Total volume - Volume of concentrated HCl
Volume of water = 100mL - 370mL
Volume of water = -270mL
Since we end up with a negative value, it indicates that adding water alone is not enough to reach the desired concentration.
Therefore, the previous calculation is incorrect, and we need to recalculate the required amounts of concentrated HCl and water to prepare the 10g/L HCl solution.