calculate the mass of NaOH neded to prepare 500mL of a 0.10 M solution.
I'm pretty sure the answer is 2g, but how do I get to that?
Another question:
calculate the molar amount of KHP used to neutralize the NaOH solution.
.51 g of KHP was added to 50 mL of distilled H2O and a total of 29.1mL out of 50mL of NaOH was added to that through a buret in a titration lab.
blah blah blah just checking if my question has made it on the site yet.
For the KHP question.
Convert 0.51 g KHP to mols. mols = g/molar mass.
You don't ask a question but I assume you want to know the molarity of the NaOH.
Mols KHP = mols NaOH.
mols NaOH = L x M. YOu have mols NaOH and L NaOH. Calculate molarity NaOH.
Post yuor work if you get stuck.
To calculate the mass of NaOH needed to prepare a 0.10 M solution, you can use the following steps:
Step 1: Determine the molar mass of NaOH. Na (Sodium) has a molar mass of 22.99 g/mol, Oxygen (O) has a molar mass of 16.00 g/mol, and Hydrogen (H) has a molar mass of 1.01 g/mol. To calculate the molar mass of NaOH, you add the molar masses of each element:
Molar mass of NaOH = (1 * molar mass of Na) + (1 * molar mass of O) + (1 * molar mass of H)
Step 2: Calculate the number of moles of NaOH needed. To do this, you use the formula:
Number of moles = concentration x volume
Given:
Concentration = 0.10 M (0.10 moles of NaOH per liter)
Volume = 500 mL = 0.5 L
Number of moles = 0.10 M x 0.5 L
Step 3: Calculate the mass of NaOH using the number of moles and the molar mass:
Mass = number of moles x molar mass of NaOH
Now, substituting the values into the equation:
Mass = (0.10 M x 0.5 L) x molar mass of NaOH
Finally, calculate the mass of NaOH that is needed.
Regarding the second question about calculating the molar amount of KHP used to neutralize the NaOH solution, here are the steps:
Step 1: Determine the molar mass of KHP (Potassium Hydrogen Phthalate). K (Potassium) has a molar mass of 39.10 g/mol, H (Hydrogen) has a molar mass of 1.01 g/mol, and Pht (Phthalate) has a molar mass of 166.13 g/mol. To calculate the molar mass of KHP, you add the molar masses of each element:
Molar mass of KHP = (1 * molar mass of K) + (1 * molar mass of H) + (1 * molar mass of Pht)
Step 2: Calculate the number of moles of KHP used. To do this, you need to know the mass and molar mass of KHP:
Number of moles = mass / molar mass of KHP
Given:
Mass of KHP = 0.51 g
Number of moles = (0.51 g) / (molar mass of KHP)
Substitute the known values and calculate the number of moles of KHP.
I hope this helps! Let me know if you have any further questions.