Part A, B, and C

Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Part A, B, and C
A student is given 50.0 mL of a solution of Na2CO3 of unknown concentration. To determine the
concentration of the solution, the student mixes the solution with excess 1.0 M Ca(NO3)₂(aq), causing a
precipitate to form. The balanced equation for the reaction is shown below.
Na2CO3(aq) + Ca(NO₂)₂ (aq) 2 NaNO3(ag) - CaCO3(s)
(u) Write the net ionic equation for the reaction that occurs when the solutions of NaCO3 and Ca(NO₂), are
mixed.
(b) The diagram below is incomplete Draw in the species needed so accurately represent the major ionic species
remaining in the solution after the reaction has been completed.
Nat
(NO3
(NO3
(Na
Solid CaCO
NO₂
(NO3
Transcribed Image Text:A student is given 50.0 mL of a solution of Na2CO3 of unknown concentration. To determine the concentration of the solution, the student mixes the solution with excess 1.0 M Ca(NO3)₂(aq), causing a precipitate to form. The balanced equation for the reaction is shown below. Na2CO3(aq) + Ca(NO₂)₂ (aq) 2 NaNO3(ag) - CaCO3(s) (u) Write the net ionic equation for the reaction that occurs when the solutions of NaCO3 and Ca(NO₂), are mixed. (b) The diagram below is incomplete Draw in the species needed so accurately represent the major ionic species remaining in the solution after the reaction has been completed. Nat (NO3 (NO3 (Na Solid CaCO NO₂ (NO3
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AP Bed
3/29/23
Solid CaCO3
The student filters and dries the precipitate or CaCO (molar mass 100.1 g/mol) and records the data in the
table below.
Volume of Na₂CO3 solution
Volume of 1.0 M Ca(NO₂), added
Mass of CaCO3 precipitate collected
PLC Library
50.0 ml
100.0 mL
0.93 g
PCC Email
AP Chemistry
Fage 1 of 2
Tes Booklet
(c) Determine the number of moles of Na₂CO3 in the original 50.0 mL of solution.
I
(d) The student realizes that the precipitate was not completely dried and claims that as a result, the calculated
Na₂CO3 molarity is too low. Do you agree with the student's claim? Justify your answer
D Bartleby
(e) After the precipitate forms and is filtered, the liquid that passed through the filter is tested to see if it can
conduct electricity. What would be observed? Justify your answer
The student decides to determine the molarity of the same Na2COs solution using a second method. When
NaCO is dissolved in water CO₂ (aa) hydrolyzes to form HCO 10g) as shown by the following
College Board
d Amazon
Transcribed Image Text:KW Retworks U save Save to RetworksS DEL MyCourses AP Bed 3/29/23 Solid CaCO3 The student filters and dries the precipitate or CaCO (molar mass 100.1 g/mol) and records the data in the table below. Volume of Na₂CO3 solution Volume of 1.0 M Ca(NO₂), added Mass of CaCO3 precipitate collected PLC Library 50.0 ml 100.0 mL 0.93 g PCC Email AP Chemistry Fage 1 of 2 Tes Booklet (c) Determine the number of moles of Na₂CO3 in the original 50.0 mL of solution. I (d) The student realizes that the precipitate was not completely dried and claims that as a result, the calculated Na₂CO3 molarity is too low. Do you agree with the student's claim? Justify your answer D Bartleby (e) After the precipitate forms and is filtered, the liquid that passed through the filter is tested to see if it can conduct electricity. What would be observed? Justify your answer The student decides to determine the molarity of the same Na2COs solution using a second method. When NaCO is dissolved in water CO₂ (aa) hydrolyzes to form HCO 10g) as shown by the following College Board d Amazon
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d) the student realizes that the precipitate was not completely dried and claims that as a result, the calculated Na2CO3 molarity is too low. Do you agree or disagree and why?

e) after the precipitate forms and is filtered, the liquid is tested to see if it conducts electricity. What would be observed? Explain.

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