Calculate the data fill in the table in pic 1 and calculation question based on the general information given in pic 2. Thank you for helping!
Calculate the data fill in the table in pic 1 and calculation question based on the general information given in pic 2. Thank you for helping!
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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Calculate the data fill in the table in pic 1 and calculation question based on the general information given in pic 2. Thank you for helping!

Transcribed Image Text:The following information may be of value:
1 mm Hg = 133.3 N m²² (Pa)
0°C = 273.15 K
1J = 1 N m
1 mL = 1 x 10-6 m3
R= 8.314 J mol K (to be used when the units of P are N m2, V are m³ and T are K)
Antacid used (Circle one)
Q
First sample
Second sample
Weight of empty capsule + cup
0.050 g
0.050 g
Weight of antacid + capsule + cup
0.171 g
0.177 g
Weight of antacid used (g)
Water level before reaction
48.15 mL
48.70 mL
Water level after reaction
22.85 mL
23.30 mL
Volume of CO liberated (mL)
Volume of CO2 liberated (m³)
Lab temperature
20
°C = 293.15
K
%3D
Atmospheric pressure (Ptotal)
765.06
mm Hg
PH2O at lab temperature =
17.5
mm Hg
PCO2 = 747.56
mm Hg
Demonstrator's
Initials
Calculations
Write a balanced equation for (i) the reaction of NaHCO; (which is in product H) with hydrochloric
acid, and (ii) the reaction of CaCO; (in product Q) with hydrochloric acid.
(i)
(ii)

Transcribed Image Text:Theory:
In this experiment, a weighed sample of antacid compound is reacted with 6 molL1
HCl to produce carbon dioxide (CO2) in a closed vessel. The following chemical
process takes place:
Antacid + HCI
salt + H;O + CO2 (g)
Obviously the above is not a balanced chemical equation. This process is carried out at
atmospheric pressure and room temperature. The volume of gas generated is determined by
measuring the volume of water displaced (pushed down) using a gas-measuring burette. The
amount of CO, corresponding to the measured volume is calculated using the ideal
gas law (PV= nRT). The composition of the antacid compound is deduced from this and
expressed as either weight % of NaHCO; or weight % of CaCO3, depending on which of these
the used antacid contains.
The ideal gas law is used as follows to calculate the amount of liberated CO2:
PV = nRT
we want to calculate the number of moles of carbon dioxide produced in the
reaction so we re-arrange the equation so that
n = PV
n (CO2) = P (CO,) x V (CÓ ,)
RT
In using this equation:
NCO2 =
moles of CO,(g) produced from the known mass of antacid:
P CO2 = (P atmosphere - PH,O) is the pressure due to CO2(g) expressed in N m2 (Pa).
The total pressure of the new volume of gas is equal to the atmospheric pressure. This
must be corrected, using Dalton's law of partial pressures as indicated, for the
contribution due to the vapour pressure of water (Appendix 4);
V = volume of CO:(g), to be expressed in SI units (m³);
R
= gas constant = 8.314 J K' mol":
T
= room temperature, to be expressed in kelvin (K).
Part 3:
Sample preparation
За.
Antacid mixtures are provided. Pick one. Working in pairs, students will analyse this
twice. The mixture has the following stated composition (weight percent):
Product H
% composition
Product Q
% composition
NaHCO,
75.3
CACO3
35.3
sucrose
19.7
kaolin
1.9
glucose
3.9
Mg trisilicate
1.9
реppermint
0.42 – 1.1
реppermint
not stated
glucose
not stated
3b.
It is necessary to choose a sample mass such that the volume of CO2 generated does
not exceed the capacity of the gas burettes.
For Product H use 0.10 – 0.13 g
For product Q use 0.20 – 0.25 g.
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