A 0.355 g sample, monoprotic acid having a molecular weight of 121 g/mol requires 18.47 mL NaOH for neutralization. Calculate the molarity of the NaOH solution.

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Nelly StrackeLv2

5 Apr 2019

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What is the molarity of a NaOH solution if 28.2 mL of a 0.355 mol/L H₂SO₄ solution is required to neutralize a 25.0 mL sample of the NaOH solution?

salmonkangaroo919

A sample of the primary standard, potassium hydrogen phthalate, with a mass of 5.020 g, requires 20.38 mL of NaOH solution for neutralization. Calculate the molarity of the NaOH solution.

a) Write balanced molecular and net ionic equations for the neutralization of NaOH by KHP( mol. WT= 204.23). KHP is an abbreviation for potassium hydrogen phthalate, KHC₈H₄O₄, a substance of known high purity with one acid hydrogen as indicated by the formula.

b) If 2.8 g of 204.23 KHP is dissolved in water and titrated with 40 ml of NaOH to the phenolphthalein endpoint, what is the molarity of the NaOH solution?

c) Standardization solution of NaOH is used to find the molecular weight of an acid H₂A which has two acid hydrogen. Write a balanced molecular equation for this titration reaction.

d) If 1.08 g of this acid requires 37.18 of the NaOH solution for titration to the appropriate endpoint. Calculate the molecular weight of the unknown acid H₂A.