Aqueous Potassium Iodate (KIO₃) and Potassium Iodide (KI) React in the Presence

question 20

Multiple Choice

Aqueous potassium iodate (KIO₃) and potassium iodide (KI) react in the presence of dilute hydrochloric acid, as shown below.
KIO₃(aq) + 5KI(aq) + 6HCl(aq) $\rightarrow$ 3I₂(aq) + 6KCl(aq) + 3H₂O(l)
What mass of iodine (I₂) is formed when 50.0 mL of 0.020 M KIO₃ solution reacts with an excess of KI and HCl?

• A) 0.13 g I₂
• B) 0.25 g I₂
• C) 0.38 g I₂
• D) 0.76 g I₂
• E) None of these answers is correct.

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Definitions:

Cylindricity

A form tolerance that defines how much a cylindrical feature's actual profile may deviate from a perfect cylinder.

Total Runout

Total runout is a tolerance that controls the total variation a surface can have when it is rotated around an axis or datum.

Datum Axis

An imaginary line defined by the geometric center or specified points of a feature, used as a reference or starting point for measurements and geometric definitions.

Checking Indicator

A precision measurement tool used to assess the conformity of parts to specified tolerances or dimensions, often in machining processes.