Chemistry: Principles and Reactions
8th Edition
ISBN: 9781305079373
Author: William L. Masterton, Cecile N. Hurley
Publisher: Cengage Learning
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Chapter 5, Problem 72QAP
Interpretation Introduction
Interpretation:
The acid used in the generation of CO2 gas from Na2 CO3 is to be determined.
Concept introduction:
Na2 CO3 reacts with both HCl and H2 SO4 to evolve gaseous carbon dioxide, CO2 . The reactions are outlined below.
As per stoichiometric equation (1),
As per stoichiometric equation (2),
By taking a ratio of the number of moles of acid used to the number of moles of CO2 evolved, the identity of the acid can be established.
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K for the reaction SbCls(g) z SÜC];(g) + Cl2(g) is 2.50 x 10 2 at 248 °C. 2.00 mol of S6CI3
and 1.00 mol of Cl, is introduced into a 4.00 L bulb at 248 °C. What are the
concentrations of all three species once equilibrium is established?
Enter
your value for [SBCI5] in the first box and an appropriate unit of measure in the
second box.
Enter
your value for [SBCI3] in the first box and an appropriate unit of measure in the
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Enter your value for [Cl,] in the first box and an appropriate unit of measure in the
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A/
A 25.00-mL sample of HCl(aq) was added to a 0.1000-g sample of CaCO3 (100.09 g/mol). All the CaCO3 reacted, leaving some excess HCl(aq), according to [CaCO3(s) + 2HCl -> CaCl2(aq) + H2O(l) + CO2(g)]. The excess HCl(aq) required 43.82 mL of 0.01185 M Ba(OH)2 in a back-titration step to complete the reaction [2HCl(aq) + Ba(OH)2(aq) -> BaCl2(aq) + 2H2O(l)]. What is the molarity of the original HCl(aq) solution?
A sample of isopropyl alcohol is sealed in a 250.0-cm³ glass bulb to which a pressure
gauge is attached. The bulb is heated to 179 °C, and the gauge shows that the pressure in
the bulb rises to 0.846 atm. At this temperature, the (CH3)2CHOH(g) is partially
dissociated into (CH3)2CO(g) and H₂(g) according to the equation
(CH3)2CHOH(g) (CH3)2CO(g) + H₂(g)
At 179 °C, Kp
= 0.444 for this reaction. Assume that the contents of the bulb are at
equilibrium and calculate the partial pressure of the three different chemical species in the
vessel.
?
P(CH3)₂CHOH
P(CH3)2CO
PH2
=
=
=
atm
atm
atm
Chapter 5 Solutions
Chemistry: Principles and Reactions
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Solutions: Crash Course Chemistry #27; Author: Crash Course;https://www.youtube.com/watch?v=9h2f1Bjr0p4;License: Standard YouTube License, CC-BY