State,in a stepwise fashion how 250mL of a 0.100m sodium hydroxide solution can be made from sodium hydroxide pellets. ..
Then calculate the needed volume of solutions above. ,in order to make a diluted 5L solution of 0.05m sodium hydroxide
1.weigh in grams to this amount 50g
2.transfer to the beaker
3.dissolve with 5ml of water
4.transfer into volumetric flask of 250ml quantitavily
5. add water to the mark on the volumetric flask
6.tilt the flask to mix the solution
Step 1: Put on your safety goggles and grab your lab coat, because we're about to get scientific!
Step 2: We'll start with the first solution. To prepare 250mL of a 0.100m sodium hydroxide solution, we need to calculate the amount of sodium hydroxide pellets required. The equation we will use is:
moles of solute = (molarity)(volume in liters)
Step 3: Convert the volume of the solution from milliliters to liters:
Volume = 250mL = 0.250L
Step 4: Now, plug in the values into the equation and solve for the moles of sodium hydroxide required:
moles of solute = (0.100m)(0.250L) = 0.025 mol
Step 5: The molar mass of sodium hydroxide is approximately 40.00 g/mol. To determine the mass of sodium hydroxide pellets needed, multiply the moles of sodium hydroxide by its molar mass:
Mass = (0.025 mol)(40.00 g/mol) = 1 g
So, to prepare 250mL of a 0.100m sodium hydroxide solution, you will need approximately 1 gram of sodium hydroxide pellets.
Now, let's move on to the second part of your question:
To make a diluted 5L solution of 0.05m sodium hydroxide, we'll use the same approach.
Step 1: Calculate the moles of solute required using the equation:
moles of solute = (molarity)(volume in liters)
Step 2: Convert the volume of the solution from liters to milliliters:
Volume = 5L = 5000mL
Step 3: Plug in the values into the equation and solve for the moles of sodium hydroxide required:
moles of solute = (0.05m)(5L) = 0.25 mol
Step 4: Use the molar mass of sodium hydroxide (40.00 g/mol) to calculate the mass required:
Mass = (0.25 mol)(40.00 g/mol) = 10 g
So, in order to make a diluted 5L solution of 0.05m sodium hydroxide, you will need approximately 10 grams of sodium hydroxide solution.
To make a 250mL of a 0.100m sodium hydroxide solution from sodium hydroxide pellets:
1. Determine the amount of sodium hydroxide pellets needed. This can be calculated using the formula:
moles = (concentration × volume) / 1000
moles = (0.100m × 250mL) / 1000
moles = 0.025
2. Convert the moles of sodium hydroxide to grams using the molar mass of sodium hydroxide (40.00 g/mol). Multiply the moles by the molar mass to get the grams needed:
grams = moles × molar mass
grams = 0.025 × 40.00
grams = 1.00 g
3. Weigh out 1.00 g of sodium hydroxide pellets using a balance.
4. Dissolve the sodium hydroxide pellets in enough distilled water to make a 250mL solution. Stir until the pellets are completely dissolved.
To calculate the volume of 0.100m sodium hydroxide solution needed to make a 5L diluted solution of 0.05m sodium hydroxide:
1. Determine the moles of sodium hydroxide needed for the final solution. This can be calculated using the formula:
moles = (concentration × volume) / 1000
moles = (0.05m × 5000mL) / 1000
moles = 0.25
2. Calculate the volume of the 0.100m sodium hydroxide solution needed using the formula:
volume = (moles × 1000) / concentration
volume = (0.25 × 1000) / 0.100m
volume = 2500mL
Thus, you would need 2500mL (or 2.5L) of the 0.100m sodium hydroxide solution to make a diluted 5L solution of 0.05m sodium hydroxide.
To make a 0.100M sodium hydroxide (NaOH) solution from sodium hydroxide pellets, follow these steps:
Step 1: Determine the amount of NaOH pellets needed.
- The molar mass of NaOH is approximately 40.00 g/mol.
- You have 250 mL of solution, which is equivalent to 0.250 L.
- The desired molarity is 0.100M.
- Use the formula: Mass (g) = Molarity (M) x Volume (L) x Molar Mass (g/mol) to find the mass of NaOH needed.
Mass (g) = 0.100M x 0.250 L x 40.00 g/mol
Step 2: Calculate the mass of NaOH pellets needed.
- Plug in the values into the formula mentioned above and calculate the mass of NaOH pellets needed.
Step 3: Dissolve the NaOH pellets in the appropriate amount of water.
- Measure the calculated mass of NaOH pellets using a balance.
- Fill a container with some distilled water. The volume should be enough to dissolve the NaOH pellets, but not exceed 250 mL.
- Add the measured NaOH pellets to the water and stir until completely dissolved.
- Once dissolved, transfer the solution to a volumetric flask and make up to a final volume of 250 mL with distilled water.
To calculate the needed volume of the 0.100M NaOH solution to make a diluted 5L solution of 0.05M NaOH, follow these steps:
Step 1: Use the formula: M1V1 = M2V2 to find the volume needed.
- M1: Initial molarity = 0.100M
- V1: Initial volume = ?
- M2: Final molarity = 0.05M
- V2: Final volume = 5L
Step 2: Calculate the volume needed.
- Rearrange the formula to solve for V1: V1 = (M2 x V2) / M1
- Plug in the values: V1 = (0.05M x 5L) / 0.100M
Step 3: Calculate the volume needed.
- Calculate the volume needed using the formula mentioned above.
- The calculated volume will give you the volume (in Liters) of the 0.100M NaOH solution required to make a diluted 5L solution of 0.05M NaOH.