Asked by Cynthia
A student titrated 1.852 g of a mixture containing potassium hydrogen phthalate, KHP....?
A student titrated 1.852 g of a mixture containing potassium hydrogen phthalate, KHP,
with 0.163 M NaOH solution. She recorded an initial buret reading of 0.84 mL and a final
buret reading of 31.32 mL.
“KHP” is shorthand for a certain acid. It contains NO phosphorus.
•Write the reaction equation for the acid-base neutralization.
I got NaOH+KHC8H4O4-->H2O+KNaC8H4O4 is this correct?
•Name the secondary standard used in the titration of the unknown KHP mixture.
• Calculate the amount of NaOH (in millimoles) delivered in the titration.
• Find the mass of KHP neutralized in the reaction.
• Calculate the mass percent of KHP in the original sample.
A student titrated 1.852 g of a mixture containing potassium hydrogen phthalate, KHP,
with 0.163 M NaOH solution. She recorded an initial buret reading of 0.84 mL and a final
buret reading of 31.32 mL.
“KHP” is shorthand for a certain acid. It contains NO phosphorus.
•Write the reaction equation for the acid-base neutralization.
I got NaOH+KHC8H4O4-->H2O+KNaC8H4O4 is this correct?
•Name the secondary standard used in the titration of the unknown KHP mixture.
• Calculate the amount of NaOH (in millimoles) delivered in the titration.
• Find the mass of KHP neutralized in the reaction.
• Calculate the mass percent of KHP in the original sample.
Answers
Answered by
DrBob222
got NaOH+KHC8H4O4-->H2O+KNaC8H4O4 is this correct?
<b>yes</b>
•Name the secondary standard used in the titration of the unknown KHP mixture.
<b>NaOH</b>
• Calculate the amount of NaOH (in millimoles) delivered in the titration.
<b>
mL x M = millimols</b>
• Find the mass of KHP neutralized in the reaction.
<b>millimoles KHP = millimoles NaOH
g KHP = (millimoles/1000)*molar mass</b>
• Calculate the mass percent of KHP in the original sample.
<b>%KHP in sample = (grams KHP/mass sample)*100 = ?</b>
<b>yes</b>
•Name the secondary standard used in the titration of the unknown KHP mixture.
<b>NaOH</b>
• Calculate the amount of NaOH (in millimoles) delivered in the titration.
<b>
mL x M = millimols</b>
• Find the mass of KHP neutralized in the reaction.
<b>millimoles KHP = millimoles NaOH
g KHP = (millimoles/1000)*molar mass</b>
• Calculate the mass percent of KHP in the original sample.
<b>%KHP in sample = (grams KHP/mass sample)*100 = ?</b>
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