a NaOh solution has a concentration of about 0.11M.How many grams of KHP would have to be used to require NaOH solution to reach the endpoint
How much NaOH? Say 30 mL?
moles NaOH = M x L = ?
moles KHP = moles NaOH
moles KHP = grams KHP/molar mass KHP.
Solve for grams KHP
To calculate the amount of KHP (potassium hydrogen phthalate) needed to react with a NaOH solution, you first need to determine the balanced chemical equation for the reaction between KHP and NaOH.
The balanced chemical equation for the reaction is:
KHP + NaOH -> KOH + H2O + C8H4O4
From the equation, we can see that one mole of KHP reacts with one mole of NaOH.
Here's how you can calculate the amount of KHP needed:
1. Determine the molar mass of KHP:
The molar mass of KHP is the sum of the atomic masses of its components. KHP has a molar mass of 204.23 g/mol (or 0.20423 g/mmol).
2. Calculate the number of moles of NaOH needed:
Since the NaOH solution has a concentration of 0.11 M, it means that there are 0.11 moles of NaOH in 1 liter of solution. Therefore, the number of moles of NaOH needed can be calculated using the formula:
moles of NaOH = concentration (M) * volume (L)
For example, if you need 100 mL (0.1 L) of NaOH solution, the number of moles of NaOH can be calculated as:
moles of NaOH = 0.11 M * 0.1 L = 0.011 moles
3. Calculate the number of moles of KHP needed:
Since the reaction is 1:1 between KHP and NaOH, the number of moles of KHP needed is also 0.011 moles.
4. Calculate the mass of KHP needed:
The mass of KHP needed can be calculated using the formula:
mass (g) = moles * molar mass
So, the mass of KHP required is:
mass (g) = 0.011 moles * 204.23 g/mol = 2.246 g
Therefore, approximately 2.246 grams of KHP would be needed to react with the given NaOH solution to reach the endpoint.