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

3. Since benzoic acid is the only solid soluble in cold water, you should dissolve the mixture in cold water and then filtrate the remaining mixture through gravity filtration. Now, you should use a hot plate to evaporate the water from the benzoic acid solution. Let the benzoic acid solution cool to room temperature and then weigh it. Next, you can separate the sodium sulfate from the mixture by dissolving it in hot water. When it’s completely dissolved, use gravity filtration to separate the two and then evaporate the water from the sodium sulfate mixture using a hot plate. Finally, you can weigh the sodium sulfate solution. To separate the remaining two solids, use suction filtration and add 3M HCL to the mixture until the reaction is complete and you will have a remaining solid of zinc hydroxide that you will need to let dry before weighing and a liquid solution of HCL and magnesium hydroxide. You can heat the magnesium hydroxide and add a chemical to it to create a precipitate and then use suction filtration to separate the HCL and magnesium hydroxide.

4. It is possible but not with the knowledge that we have as of now. The reason we wouldn’t be able to separate the components is because the sodium chloride and calcium ca

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,