Lab 6: Mole-Mass Relationships Lab

Purpose

The purpose of this lab was a representation of mass to mass relationships that exist in a chemical reaction. This lab also helped us practice to calculate and understand limiting reactants, theoretical yields, and percent yields.

Data

Mass of evaporating dish-28.98 g
Mass of evaporating dish + NaHCO ₃ - 31.01 g
Mass of NaHCO ₃ - 2.03 g
Volume of 6 M HCl- 15 mL
Mass of evaporating dish + remaining (solid) product- 30.31 g
Mass of remaining solid product- 1.33 g

Possible sources of Error

The possible sources of error included popping as this would reduce the mass and, hence percent yield. Also, the shape of the beaker was another source of error. The beaker was cylindrical while the evaporating was more like a bowl. Therefore, the cylindrical beaker would be a downfall because the water would condense on the sides and fall back in.

This is a picture of my work and answers for numbers 1-4. To clarify number 1: Because it has a higher molar mass which means that there would be less moles than the others.