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December 9, 2016

Homework Help: Chem Lab Help

Posted by Tyler on Monday, October 29, 2012 at 10:37pm.

Trial #1 Trial #2 Trial #3
Mass: gelatin capsule (g) .123 .118 .122
Mass: whole alka-seltzer tablet (g) 3.230 3.230 3.230
Mass: capsule + alka-seltzer sample (g) .822 .882 .677
Mass: system before reaction (g) 23.109 23.110 22.735
Mass system after reaction (g) 21.742 21.813 21.500
Temperature (°C) 21.9 22.1 22.4
Pressure (mmHg) 778 778 778
Volume of water collected (mL) 76.3 78.1 77.3


Answer the following questions using the data you collected in the lab:

Trial #1 Trial #2 Trial #3
Calculate the mass (g) of alka-seltzer in each capsule :

Trial #1 Trial #2 Trial #3
Calculate the mass (g) of NaHCO3 reacted in each sample :
Trial 1 Trial 2 Trial 3
Calculate the percent mass of NaHCO3 in each sample (%):
Trial 1 Trial 2 TRial 3

I wanted to know how to approach these problems.

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