Describe how would accurately prepare one litre of 150 ppm using copper
You can't make 150 ppm Cu. You can make 150 ppm Cu^2+
1 ppm = 1 mg/L.
150 ppm = 150 mg/L. So weigh 150 mg Cu, dissolve in a little HNO3, make to the mark in a 1 L volumetric flask with DI water, mix thoroughly, stopper, bingo.
To accurately prepare one liter of a 150 ppm solution using copper, you will need to follow these steps:
Step 1: Determine the mass or volume of the copper salt or compound needed to achieve a concentration of 150 ppm. This value can be calculated using the formula:
Mass of Copper (g) = Concentration (ppm) x Volume (L) x Atomic mass of Copper (g/mol)
Step 2: Choose a suitable copper salt or compound, such as copper sulfate (CuSO4), copper chloride (CuCl2), or copper nitrate (Cu(NO3)2), based on the solubility and availability of the compound.
Step 3: Calculate the molar mass of the chosen copper salt or compound by adding up the atomic masses of its constituent elements. For example, for CuSO4:
Molar mass of CuSO4 = (Atomic mass of Copper) + (Atomic mass of Sulfur) + (4 x Atomic mass of Oxygen)
Step 4: Convert the mass of copper calculated in step 1 to moles by dividing it by the molar mass of the chosen copper salt or compound.
Number of moles of Copper = Mass of Copper (g) / Molar mass of Copper (g/mol)
Step 5: After calculating the number of moles, determine the volume of water needed to achieve a final volume of 1 liter.
Step 6: Dissolve the calculated amount of the copper salt or compound in the predetermined volume of water. Use a suitable container and gently stir until all the salt or compound has dissolved.
Step 7: Once fully dissolved, transfer the solution to a 1-liter volumetric flask and add enough water to reach the 1-liter mark. Mix the solution thoroughly.
Now, you have successfully prepared one liter of a 150 ppm solution using copper. Remember to handle chemicals safely and follow proper lab protocols while preparing solutions.
To accurately prepare one liter of a 150 ppm (parts per million) solution using copper, you will need to follow these steps:
Step 1: Calculate the mass of copper you will need:
To determine the amount of copper needed, you need to know the molar mass of copper. Copper's molar mass is approximately 63.55 g/mol.
The ppm concentration is defined as the ratio of the mass of solute (copper) to the mass of the solution (water) multiplied by 1 million. Mathematically, it can be expressed as:
ppm = (mass of solute / mass of solution) x 1,000,000
Converting ppm to a mass ratio:
150 = (mass of copper / 1000 g) x 1,000,000
We know that we want a 1-liter solution, which is equivalent to 1000 grams of water. So, substituting this value into the equation:
150 = (mass of copper / 1000 g) x 1,000,000
Simplifying the equation:
150,000 = mass of copper
Therefore, you will need 150,000 milligrams or 150 grams of copper to prepare the desired concentration.
Step 2: Prepare a copper solution:
Weigh out 150 grams of copper using a balance, ensuring you measure accurately.
Step 3: Dissolve the copper in water:
Add the 150 grams of copper into a clean container, and gradually add distilled or deionized water while stirring continuously until all the copper has dissolved.
Step 4: Bring the solution to one liter:
Once the copper has completely dissolved, transfer the solution to a 1-liter volumetric flask and fill it up to the 1-liter mark with distilled or deionized water. Make sure to mix the solution thoroughly.
Step 5: Verify the concentration:
To confirm the concentration, you may use appropriate analytical instruments or methods such as atomic absorption spectroscopy or inductively coupled plasma analysis to measure the actual concentration of copper in the solution.
By following these steps, you will be able to accurately prepare a one-liter solution with a concentration of 150 ppm using copper.