Experiment - Conclusion?

Question

I've been doing an experiment about saturating salt, and i dont know how to write the conclusion.

Aim:
To discover what the maximum amount of salt is that can be dissolved in a specific amount of water


My Hypothesis:
I think that it will take 20grams of salt till it discontinues dissolving.

The results:
Salt added to water Observation
2 gramsS Salt dissolves rapidly
2 grams (total of 4 grams) Salt dissolves at high-speed
2 grams (total of 6grams) Salt dissolves fast
2 grams (total of 8grams) Salt dissolves well
2 grams (total of 10rams) Salt dissolves slower
2 grams (total of 12rams) Salt dissolves slow
2 grams total of 14rams) Salt dissolves very slow
2 grams (total of 16rams) Salt doesn’t dissolve

Pls help me to write the conclusion!!!

Method:
1.Fill the beaker with exactly with 40ml of water.
2.Measure 2 grams of salt.
3.Put the salt in the water and stir for as long as it takes for the salt to dissolve.

Answer 1

Well, to be more quantitative you could've stated how you were stirring and in what sized container, whether or not you used distilled water, etc. This would help clear up the relative "speed" of disassociation of NaCl.

However, you should write your conclusion by discussing how far off you were from your expected findings and then try to compare this to a theoretical (or, accepted value) for the solubility of salt. According to Wikipedia, at 25degrees Celsius (about room temperature), 35.9 g of salt dissolved in/100 mL water. This is the maximum concentration, or saturation point for sodium chloride.

In review, try discussing how close you were to what you thought your value was going to be, why you might've been off, what you could've done better and more efficiently.

--Edit: Don't listen to the joker above me, he'll help you get a bad grade. "Dissolvement" isn't even a real word.--

Answer 2

All you gotta report in the conclusion is your result.
That is something like " from the above experiment conducted we can conclude that in a given volume (x mL) of water, y grams of salt could be dissolved by stirring. what was also seen was the fact that each successive addition of salt took longer than the previous to dissolve."

but i have a doubt regarding the experiment. heating the water will allow more salt to dissolve. so another thing you could do is to add excess salt in a given volume of water (say 100 mL) and gently heat the water to say 70-80 degrees(don't boil)...keep stirring so that the salt dissolves...in case all of the salt dissolves, add more until no more dissolves...after that filter the water to get a solution that has no more undissolved salt...that would be the supersaturated solution...on cooling this solution you'd get some amounts of salt back as precipitate...calculate the amount of salt that didn't dissolve and subtract it from the amount added....this should give you your saturating amount of salt.

Answer 3

In 2 grams of water (i believe the 2 grams is water right?) the salt ceased to dissolve at 16 grams, according to the graph, 4 grams less then the presupposed amount. Therefore it seems to be that the maximum dissolvement of salt is at a bit under 16 grams.

Answer 4

A basic conclusion you could come up with is that your specific amount of unspecified type of water can hold no more than 16 grams of water.

For an experiment, you need to report everything. For one, how much friggin water are you using. Another is the type of water you're using. Please report it next time. Another thing to consider is to do multiple trials (something like this, I'd suspect 10 should suffice.) since just because you do it once doesn't mean anything unless it's repeatable and when you report your results, report ur average quantities (i.e. average amount of salt dissolved.)