The zinc content of a 1.03 g ore sample was determined by dissolving the ore in HCl,

The zinc content of a 1.03 g ore sample was determined by dissolving the ore in HCl, which reacts with the zinc. The excess H

The amount of I (aq) in a solution can be determined by titration with a solution containing a known concentration of s.O (aq

The zinc content of a 1.03 g ore sample was determined by dissolving the ore in HCl, which reacts with the zinc. The excess HCl is then neutralized with with NaOH. The reaction of HCI with Zn is shown.

Zn(s)+2 HCl(aq) → ZnCl₂ (aq) +H₂ (g)

The ore was dissolved in 150 mL of 0.600 M HCI, and the resulting solution was diluted to a total volume of 300 mL. A 20.0 mL aliquot of the final solution required 8.22 mL of 0.539 M NaOH to neutralize the excess HCI. What is the mass percentage (%w/w) of Zn in the ore sample?

The amount of I (aq) in a solution can be determined by titration with a solution containing a known concentration of S₂O₃^2- (aq) (thiosulfate ion). The determination is based on the net ionic equation

2S₂O₃^2- (aq)+I₃^-(aq) -> S₄O₆^2-(aq) +3I^- (aq)

Given that it requires 35.2 mL of 0.240 M Na₂S₂O₃(aq) to titrate a 15.0 mL sample of I₃^- (aq), calculate the molarity of I₃^- (aq) in the solution.

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queen_honey_blossom answered 1 year ago

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