My conclusion was that my hypothesis is true, and I got a 80-90% percent yield for the precipitate which I believe would be close enough to prove it. This is a pretty straight forward experiment as I see it, but I don't know what exactly it is supposed to 'prove'.Īll I could think of was that this was an experiment to show that reactions occur in stoichiometric quantities, so my hypothesis was that the complete precipitation reaction between sodium carbonate and calcium chloride dihydrate will be occurring according to the stoichiometry of the balanced equation. (Using proportions and molar mass)Ĭalcium carbonate will be in precipitated form, so we proceed with the precipitation reaction to get the actual yield of the precipitate and calculate its percent yield using the theoretical yield we had calculated above. We are initially given a certain amount of calcium chloride dihydrate we will be using in grams, so we calculate the amount of sodium carbonate needed to get the maximum yield using stoichiometry, and calculate the theoretical maximum yield of the calcium carbonate. It's a reaction between sodium carbonate and calcium chloride dihydrate to create calcium carbonate, sodium chloride, and water. After performing the reaction, we calculate the percent yield of product. I don't even really know what the hypothesis should be to begin with.īasically, we use stoichiometry to determine the amount of reactant needed to create the maximum amount of product in a precipitation reaction. I'm currently writing the lab report for the the 'Stoichiometry of a Precipitation Reaction' lab, and I'm having trouble with drawing a conclusion to prove the hypothesis with multiple reasons using the data from the experiment to back it up. Hi, I really need help with my lab report. A screenshot is preferable to a picture of your laptop screen. Please do not ask for help acquiring, preparing, or handling illicit substances or for help with any activity that does not fall within the confines of whatever laws apply to your particular location.īonus points: If submitting a picture please make sure that it is clear. Any infractions will be met with a temporary ban at the first instance and a permanent ban if there is another. It is also important that you describe the specific part of the problem you are struggling with. It is OK if you are a little (or a lot!) stuck, we just want to see that you have made an effort. Please complete any questions as much as you can before posting. We will not do your homework for you, so don't ask. ![]() ![]() Please flair yourself and read over the rules below before posting.
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