A student carried out the alka-seltzer experiment and obtained the following dat

Question

A student carried out the alka-seltzer experiment and obtained the following data: Patm= 656.7 Twater= 27.0 degrees celcius Vi=0.30 mL Vf=17.05mL Mass of Alka-seltzer sample 0.124g At this temperature Pwater= 26.7torr
a. Calculate the partial pressure of CO2.
b. Calculate the miles of CO2 present
c. Calculate the mass of NaHCO3 in the Alka seltzer sample
Can you show the steps and explain please :) A student carried out the alka-seltzer experiment and obtained the following data: Patm= 656.7 Twater= 27.0 degrees celcius Vi=0.30 mL Vf=17.05mL Mass of Alka-seltzer sample 0.124g At this temperature Pwater= 26.7torr
a. Calculate the partial pressure of CO2.
b. Calculate the miles of CO2 present
c. Calculate the mass of NaHCO3 in the Alka seltzer sample
Can you show the steps and explain please :) Patm= 656.7 Twater= 27.0 degrees celcius Vi=0.30 mL Vf=17.05mL Mass of Alka-seltzer sample 0.124g At this temperature Pwater= 26.7torr
a. Calculate the partial pressure of CO2.
b. Calculate the miles of CO2 present
c. Calculate the mass of NaHCO3 in the Alka seltzer sample
Can you show the steps and explain please :)

Explanation / Answer

Partial Pressure of the CO2 formed = 656.7 - 26.7 = 630 torr Answer for (a)

Volume = 17.05-0.3 = 16.75 mL

Amount of CO2 formed

PV = nRT

630 x 0.01675 = n x 62.363 x 300

n = 5.64 x 10-4 moles answer for (b)

1 mole of NaHCO3 will give 1 mole of CO2 as per the equation

NaHCO3 ---> NaOH + CO2

SO moles of NaHCO3 = 5.64 x 10-4 moles

so mass of NaHCO3 is 5.64 x 10-4 moles x 84g/mol = 0.047 g answer for (c)

SO it will be 0.047/0.124 x 100 = 38.21%

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