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Transcript

Conclusion

According to my experiments it appears that Sugar actually does dissolve faster than Salt. While I thought the fact that Salt crystals were much smaller would be key that was however not important as Sugar molecules seemed to break down far more easily. According to my research these results can be proven valid by the fact that I learned that salt particles are actually 40% denser than sugar particles. This means that even though we measured ½ of a teaspoon of both solutes there was still a far larger amount of salt particles. This means that the solvent would have to take longer to destroy the molecular bonds. One great example is the water test because since sugar molecules have a weaker bond they were more prone at being dismantled by the polar water molecules. The salt on the other hand has strong ion bonds that require a lot more energy to break down which shows why it took longer for the salt to completely dissolve in the water. Another interesting thing that I learned while conducting research is that table salt contains an anti-caking agent (Calcium silicate) that absorbs liquid to keep the salt from becoming a salt block, this agent slows down the dissolving process. Through the lab experiment and research it is clear that my work is valid and I understand why my experiment went the way it did.

Trial 3

Water

Time Start End (min.) Tim elapsed(sec.)

Sugar 0:00 3:01 181

Salt 0:00 3:11 191

Windex

Time Start End (min.) Time elapsed (sec.)

Sugar 0:00 2:58 178

Salt 0:00 3:02 182

Vinegar

Time Start End (min.) Time elapsed (sec.)

Sugar 0:00 3:17 197

Salt 0:00 2:26 146

Apple juice

Time Start End (min.) Time elapsed (sec.)

Sugar 0:00 3:29 209

Salt 0:00 3:12 192

Iced tea

Time Start End (min.) Time elapsed (sec.)

Sugar 0:00 2:35 155

Salt 0:00 2:28 148

Research question/purpose

Which dissolves faster, Salt or Sugar?

The purpose of this experiment is to determine which of the two solutes dissolves the quickest in a variety of liquid solvents.

Hypothesis

Salt will dissolve faster due to the smaller size of the grains.

Materials list

Which Dissolves faster, Salt or Sugar?

1) Water

2) Windex (liquid ammonia)

3) White vinegar (distilled)

4) Apple juice

5) Iced tea

6) 12 clear plastic cups

7) A permanent marker

8) Measuring spoons/cups

9) Clock/stopwatch

Trial 2

Submitted by: Alexander Herrera

Water

Time Start End (min.) Time elapsed (sec.)

Sugar 0:00 3:04 184

Salt 0:00 3:09 189

Windex

Time Start End (min.) Time elapsed (sec.)

Sugar 0:00 2:52 172

Salt 0:00 2:59 179

Vinegar

Time Start End (min.) Time elapsed (sec.)

Sugar 0:00 3:12 192

Salt 0:00 2:34 154

Apple juice

Time Start End (min.) Time elapsed (sec.)

Sugar 0:00 3:34 214

Salt 0:00 3:14 194

Iced tea

Time Start End (min.) Time elapsed (sec.)

Sugar 0:00 2:31 151

Salt 0:00 2:36 156

Materials (Solvents & Solutes)

Windex

White vinegar

Iced tea

Water

Apple juice

Sugar

Results: Trial 1

Salt

Water

Time Start End (min.) Time elapsed(sec.)

Sugar 0:00 2:57 177

Salt 0:00 3:06 186

Windex

Time Start End (min.) Time elapsed (sec.)

Sugar 0:00 2:53 173

Salt 0:00 3:04 184

Vinegar

Time Start End (min.) Time elapsed (sec.)

Sugar 0:00 3:19 199

Salt 0:00 2:27 147

Apple juice

Time Start End (min.) Time elapsed (sec.)

Sugar 0:00 3:26 206

Salt 0:00 3:07 187

Iced tea

Time Start End (min.) Time elapsed (sec.)

Sugar 0:00 2:28 148

Salt 0:00 2:39 159

Procedures

1) Write "salt" on 6 cups and "sugar" on the remaining 6 cups.

2) 1/2 teaspoon of salt into the 6 cups labeled salt.

3) 1/2 teaspoon of sugar into cups labeled sugar.

4) Add 8 ounces of water to the sugar cups and 8 ounces to the salt cups.

5) Observe solutes dissolving is solvents and record data

6) Calculate the elapsed time before the solute dissolved.

7) Repeat #4-6 using the 4 other solvents.

8) Wash, rinse, and dry cups at the end of the trial.

9) Repeat #2-8 for total of 3 trials per liquid

10) Calculate average dissolving time for the solutes in each solvent.

Procedure

12 cups, six sugar, six salt

1/2 teaspoon of salt into 6 of the cups

1/2 teaspoon of sugar into 6 of the cups

Add a cup of water

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