Question

Can someone help me fill out this chart in this experiment "Antacid using ideal gas law"

btw. the mass of sample is the NaHCO3

thank you!!

Atmospheric pressure, mmHg 755. 1mmitg Temperature of H,0.C zle 22.0°C Vapor pressure of H,O at this temperature 19.8 mm Hg Calculated pressure of Co, in the system, mmHg 735.3 mmity Balanced reaction of NaHCO, and HCl (see Pre-Laboratory Question 4a) = Na HCO3 laq) + HCl(aq) – NACI Cagit CO2(g) + H2Oles Trial 1 2 3 Mass of sample, 8 Villal ml 0.1920, 0.1513 10.5ml 10l4amt 28. ComL 29.6mL 18.1 mL 17.7mL final ml Vomar ml. (Vani - Vinnu

Answer 1

1) Moles of NaHCO3 = moles of CO2

For trail 1 : moles of NaHCO3 = 0.0007 moles

For trail 2 : moles of NaHCO3 = 0.0007 moles

2) Mass of NaHCO3 = moles ×molar mass = moles ×84

For both trail : mass of NaHCO3 = 0.0007×84 = 0.0588 g

3) Mass% of NaHCO3 = mass of NaHCO3×100/sample mass

For trail 1 : mass % = 0.0588×100/0.1920 = 30.625 %

For trail 2 : mass % = 0.0588×100/0.1513 = 38.86%

4) Average mass % = (30.625+38.86)/2 = 34.74 %

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