Rearrange the titration calculation to find Mb in a solution. If I put 13.2 mL of NaOH and 0.3 mL of phenolphthalein in 25 mL of KHP, what is the Mb of
the solution? The original solution of NaOh is 100 mL and is composed of 1.069e-15 moles of H+, 9.445e-2 moles of OH-, and 9.445e-2 moles of Na+. The KHP is 25 mL and is composed of 4.433e-5 moles of H+, 1.424e-13 moles of OH-, 1.246e-2 moles of KHP, and 4.433e-5 moles of KHP-.
Please walk me through the steps of this question.
To find the Mb of the solution, we can use the titration calculation formula:
( #moles of NaOH ) / ( volume of NaOH ) = ( #moles of Mb ) / ( volume of Mb )
Let's break down the steps and calculate each value step by step:
Step 1: Determine the moles of NaOH used.
To find the number of moles of NaOH, we can use the formula:
moles = concentration * volume
Given:
Volume of NaOH used = 13.2 mL
Original solution of NaOH:
- Volume = 100 mL
- Moles of OH- = 9.445e-2 moles
We can calculate the concentration of NaOH as follows:
Concentration of NaOH = Moles of OH- / Volume of NaOH
Concentration of NaOH = 9.445e-2 moles / 100 mL
Next, we calculate the moles of NaOH used:
Moles of NaOH = Concentration of NaOH * Volume of NaOH used
Moles of NaOH = (9.445e-2 moles / 100 mL) * 13.2 mL
Step 2: Determine the moles of Mb.
Given:
Volume of Mb = 25 mL
We need to determine the number of moles of Mb in 25 mL of the solution. For this, we will use the rearranged formula:
( #moles of NaOH ) / ( volume of NaOH ) = ( #moles of Mb ) / ( volume of Mb )
Rearranging the formula to solve for the moles of Mb, we have:
(#moles of Mb) = (#moles of NaOH) * (volume of Mb) / (volume of NaOH)
Substituting the values we have calculated so far:
(#moles of Mb) = (moles of NaOH) * (volume of Mb / volume of NaOH)
Step 3: Calculate the Mb concentration.
To find the concentration of Mb, we can divide the moles of Mb by the volume of Mb:
Concentration of Mb = (#moles of Mb) / (volume of Mb)
Substituting the values we have calculated so far, we can determine the Mb concentration.
That's it! By following these steps, you can rearrange the titration calculation to find the Mb concentration in the solution.