potassium hydrogen phthalate (KHP) is often used as a primary standard in acid-b

Question

potassium hydrogen phthalate (KHP) is often used as a primary standard in acid-base titration. If 19.75 mL of NaOH is required to neutralize 0.382g of KHP, what is the concentration of the NaOH? Jump to M 1411 Lecture and Lab-Summer16-LINDSAY I Activities and Due Dates | centration of an Unknown Acid Solution 0.9/37/12/2016 11:13 AM -d Periodic Table 13/2016 07:45 AM Calculator stion 7 of 9 Sapling Learning May Potassium hydrogen phthalate (KHP) is often used as a primary standard in acid-base titration.If 19.75 mL of NaOH is required to neutralize 0.382 g of KHP, what is the concentration of the NaOH? Number O Previous " Check Answer 0 Next Exit Consider the stoichiometric ratio in the reaction between KHP and NaOH

Explanation / Answer

potassium hydrogen phthalate (KHP) is often used as a primary standard in acid-base titration. If 19.75 mL of NaOH is required to neutralize 0.382g of KHP, what is the concentration of the NaOH?

KHP + NaOH ----> NaKP + H2O

1 mole of KHP = 1 mole of NaOH

moles of KHP = 0.382/204.2 = 0.00187

moles of NaOH = 0.00187

M = n/V

    = 0.00187/0.01975

    = 0.0947 M

Concentration of NaOH = 0.0947 M

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