Question

1a. Potassium hydrogen phthalate is a solid, monoprotic acid frequently used in the laboratory as a primary standard. It has the unwieldy formula of KHC₈H₄O₄. This is often written in shorthand notation as KHP.

If 21.1 mL of a barium hydroxide solution are needed to neutralize 1.59 grams of KHP, what is the molarity of the barium hydroxide solution?

1bThe concentration of Sn²⁺ in a solution is determined by titrating it with a 0.1053 M Ce⁴⁺ solution. The balanced net ionic equation for the reaction is:

• 2Ce⁴⁺(aq) + Sn²⁺(aq) 2Ce³⁺(aq) + Sn⁴⁺(aq)

In one experiment, 23.68 mL of the 0.1053 M Ce⁴⁺ solution is required to react completely with 40.00 mL of the Sn²⁺solution. Calculate the concentration of the Sn²⁺ solution.

Answer 1

। २३ अप्रैल २०१२ Sunrise - 5.13 AM Sunset 5.56 PM Sunrise 5.12 AM soos MONDAY Moles of KHP = 1.598 - (M. W of Kup= 209.228) 204.22% 20.0078 moles e mole Ba(OH), con neutralize a moles KAP . Bacon) have to neutralize o 2x0.0078 moles = 0.0156 moles . Molarity = 0.0156 x 1000 - 0.74 M 21.1 16 a le (ap) & Sn 2 (an 2 663® Coy & Sn 19 (aq) Imole sn 20 neutralize a mole ce 40 - VMs = 2 V2 M2 XE & Vin volume of => 40KM, = 2 x 23.68 x 0. 1053 Max molarity of Sn2 - Mg = 2x23.68x0.1053 V2 volume of 640 120 40 aro Momol M2 molarity & 620 = 0.125 M