mass % of sand 18.61% mass % of sand 20.7%

mass % of seashells 18.53% mass % of seashells 27.0%

total mass % recovery 80.41% total mass % recovery 81.0%

2. a) If the beaker was heated too vigorously and solution splattered out, the mass percent of the NaCl (salt) would be less than the actual because some of it was lost when it splattered out of the beaker.

b) If the recovered sand wasn’t completely dry it would still contain some of the solution that was removed from it and would therefore cause a higher mass content.

c) There wasn’t a specified amount of HCL to use but you needed to use enough so that all of the calcium chloride is removed from the seashell and sand mixture. If you only used half of the recommended amount, then more than likely you didn’t remove all of the calcium chloride from the mixture and will therefore have a higher % of sand and lower % of seashells than their actual mass percent.

d) Once again, there wasn’t a specified amount of potassium carbonate to use but you needed to use enough so that a precipitate was formed and if y

Some topics in this essay:
Post-Laboratory Questions, mass %, magnesium hydroxide, benzoic acid, sodium sulfate, sea salt, beach sand, % seashells, mass percent, % sand, acid solution, mass % seashells, benzoic acid solution, original mixture composed, wasn’t specified amount, mass % sand,