How do you prepare 17.2cm³ of 36% conc HCL per dm³ of solution?
Measure 36g of HCL take it to 100g with water.Find density. The density of the solution is mass (100g) divided by volume of the mixture( from measuring cylinder). The mass in g/dm3 is 17.2cm3 times density got. Then you use the mass obtain to prepare the g/dm3 solution separately.That's it. Lemme know when you get this.
To prepare 17.2 cm³ of 36% concentrated hydrochloric acid (HCl) per dm³ of solution, follow these steps:
1. Determine the volume of the final solution in dm³ (cubic decimeters). Since the solution needs to be 17.2 cm³ of HCl per dm³ of solution, the total volume of solution needed is 1 dm³.
2. Calculate the amount of concentrated HCl required. To determine this, multiply the volume of the solution by the concentration of the HCl. In this case, multiply 1 dm³ by 36% (0.36) to get 0.36 dm³ (or 360 cm³) of HCl.
3. Measure 360 cm³ (or 0.36 dm³) of concentrated HCl using a measuring cylinder or pipette.
4. Transfer the measured amount of concentrated HCl to a suitable container.
5. Add distilled water to the container to make up the remaining volume. In this case, add enough distilled water to make a total volume of 1 dm³.
6. Mix the solution thoroughly to ensure proper dilution.
Note: Always exercise caution when handling concentrated acids, as they can be corrosive and harmful. It is recommended to wear appropriate protective equipment such as gloves and goggles while preparing the solution.
To prepare 17.2 cm³ of a 36% concentration of hydrochloric acid (HCl) per dm³ of solution, we need to follow a few steps:
Step 1: Convert the volume to dm³.
To convert cm³ to dm³, divide the volume by 1000. In this case, dividing 17.2 cm³ by 1000 gives us 0.0172 dm³.
Step 2: Calculate the mass of HCl needed.
We need to determine how much HCl is present in the given concentration (36%). This means that for every 100 cm³ of solution, 36 cm³ is HCl. Since we are working with 0.0172 dm³ (or 17.2 cm³), we can calculate the mass using the formula:
Mass of HCl = (Volume of solution in dm³) × (Concentration of HCl in g/dm³)
Inserting the values:
Mass of HCl = 0.0172 dm³ × 36 g/dm³ = 0.6192 g
Therefore, we need 0.6192 g of HCl to prepare the solution.
Step 3: Calculate the concentration of the HCl stock solution.
The concentration of the HCl stock solution is commonly expressed in molarity (mol/dm³). To find the molarity, we can use the formula:
Molarity (M) = (Mass of solute in g) / (Molar mass of solute in g/mol) / (Volume of solution in dm³)
The molar mass of HCl is 36.5 g/mol. The volume of the solution is 1 dm³ since the concentration is given per dm³.
Inserting the values:
Molarity (M) = 0.6192 g / 36.5 g/mol / 1 dm³ ≈ 0.0169 M
Therefore, the concentration of the HCl stock solution is approximately 0.0169 M.
To summarize, to prepare 17.2 cm³ of 36% conc HCl per dm³ of solution, you would need 0.6192 g of HCl in 0.0172 dm³ of solution. This would be equivalent to a stock solution with a concentration of approximately 0.0169 M.