15. A marble chip weighing one gram and once gram of powdered chalk (both CaCO,) were placed in two similar beakers half full of I M HCL. The chalk dissolved in seconds whereas the marble chip was still visible after a few minutes. The most likely ex- planation of this is that A) different reactions were taking place. B) the chalk dissolved quickly because of its degree of purity. C) acids react quickly with all powdered substances, D) the rate of reaction depended on particle size. E) chalk is more soluble in HCI.

Fundamentals Of Analytical Chemistry
9th Edition
ISBN:9781285640686
Author:Skoog
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Chapter12: Gravimetric Methods Of Analysis
Section: Chapter Questions
Problem 12.31QAP
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15. A marble chip weighing one gram and one
gram of powdered chalk (both CaCO,) were placed in
two similar beakers half full of I M HCI. The chalk
dissolved in seconds whereas the marble chip was
still visible after a few minutes. The most likely ex-
planation of this is that
A) different reactions were taking place.
B) the chalk dissolved quickly because of its degree
of purity.
C) acids react quickly with all powdered substances,
D) the rate of reaction depended on particle size.
E) chalk is more soluble in HCI.
Transcribed Image Text:15. A marble chip weighing one gram and one gram of powdered chalk (both CaCO,) were placed in two similar beakers half full of I M HCI. The chalk dissolved in seconds whereas the marble chip was still visible after a few minutes. The most likely ex- planation of this is that A) different reactions were taking place. B) the chalk dissolved quickly because of its degree of purity. C) acids react quickly with all powdered substances, D) the rate of reaction depended on particle size. E) chalk is more soluble in HCI.
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