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Elkay
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I'm working on a prelab assignment and couldn't remember exactly what to do in order to solve the following problems. Any help would be greatly appreciated:
a. If 4.0 ml of 0.3M of KI is mixed with 1.0 ml of deionized water, 1.0 mL of buffer solution, 1.0 mL of 0.2 M [tex]Na_{2}S_{2}O_{3}[/tex], and 3.0 mL of [tex]H_{2}O_{2}[/tex], what is the initial molar concentration of I- (at time=0, before the reaction)?
b. How many moles of [tex]I_{2}[/tex] are generated in the rection during the time lapse of the rate measurement? The following equations are given:
[tex]2 I^- _{(aq)} + H_{2}O_{2} + 2 H_{3}O^+ _{(aq)} \longrightarrow I_{2(aq)} + 4 H_{2}O_{(l)}[/tex]
[tex]2S_{2}O_{3}^2- _{(aq)} +I_{2}_{(aq)} \longrightarrow 2I^- _{(aq)} + S_{4}O_{6}^2- _{(aq)}
[/tex]
a. If 4.0 ml of 0.3M of KI is mixed with 1.0 ml of deionized water, 1.0 mL of buffer solution, 1.0 mL of 0.2 M [tex]Na_{2}S_{2}O_{3}[/tex], and 3.0 mL of [tex]H_{2}O_{2}[/tex], what is the initial molar concentration of I- (at time=0, before the reaction)?
b. How many moles of [tex]I_{2}[/tex] are generated in the rection during the time lapse of the rate measurement? The following equations are given:
[tex]2 I^- _{(aq)} + H_{2}O_{2} + 2 H_{3}O^+ _{(aq)} \longrightarrow I_{2(aq)} + 4 H_{2}O_{(l)}[/tex]
[tex]2S_{2}O_{3}^2- _{(aq)} +I_{2}_{(aq)} \longrightarrow 2I^- _{(aq)} + S_{4}O_{6}^2- _{(aq)}
[/tex]
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