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Speedy Solutions Lab Report
Hannah Parryon 10 May 2011
Transcript of Speedy Solutions Lab Report
By: Hannah Parry Statement of the Problem:
How can you control the rate
at which certain salts dissolve in water? Background info:
The main thing that I know about salt is really does depend on what kind of salt you use. The density of the salt effects how long it takes to dissolve. Hypothesis:
I predict that a hotter temperature of water would be the best way to control the rate at which salt dissolve in water. Materials:
- heat source
- thermometer (in Celcious)
- Table salt (5 grams per test) PROCEDURE 1) Do your best to heat water to desired temperature. 2) Pour the salt in. 3) Immediately after pouring the salt, start your timer. 4) Pour the salt. 5) When it looks as if the salt can't dissolve anymore, stop the timer. 6) Record your results of the time. 7) Record steps 1-6 again 2 more times, but at different temperatures. DATA Test 1: 10C
1: 25.1 sec.
2: 27.2 sec.
3: 28.8 sec. Test 2: 20C
1: 52.65 sec.
2: 59.6 sec.
3: 57.6 sec. Test 3: 30C
1: 12.7 sec.
2: 10.3 sec.
3: 13.4 sec. GRAPH Conclusions: In this lab, we tested at different temperatures how long it would take for a certain kind of salt to dissolve. My hypothesis was that the hotter the temperature of the water, the faster it would dissolve. I accept my hypothesis because each time it got hotter, it dissolved faster. In the data, we did 3 tests at 3 different temperatures . 2 things I learned from this lab is that salt dissolves faster pertaining to a hotter temperature and that the amount of salt effects how fast it dissolves. The way this relates to real life is like if you are heating up something that’s frozen. The more frozen or how big it is effects how fast it takes to make is softer. One question I have for this lab is: How many different salts are there and which one is the most dense? Possible errors:
There were a couple of things that could have happened during this lab. Adding too much salt would definetaly effect how long it would take to dissolve the salt especially if you had a small density of water. A smaller beaker would make it a lot harder to do this lab. And finally, if you used too hot of water you could burn your hands.