Archive of ‘Intergrated Studies’ category

Scientific Lab Report

                                                             

 Title of experiment:

Dissolving Salt in Different Liquids.

Team members:   Juliet.

 

Aim: To observe which liquid salt dissolves the quickest in out of oil, vinegar, water, and lemon juice.

Hypothesis/Prediction: I think the salt in the oil won’t dissolve. I think that the water will dissolve but take longer. I think the vinegar or lemon juice will be the quickest probably the lemon juice because they are both very acidic but lemon juice is slightly more.

Materials:

  • Salt rocks (5-6 teaspoons in case you need extra).
  • ¼ (62 ml.) of a cup of room temperature lemon juice.
  • ¼ (62 ml.) of a cup of room temperature water.
  • ¼ (62 ml.) of a cup of room temperature vinegar.
  • ¼ (62 ml.) of a cup of room temperature rice bran oil.
  • 4 stopwatches
  • 1 measuring teaspoon
  • 4 glass beakers
  • A ¼ measuring cup

Method:

  • Pour out each liquid, (oil, vinegar, water, and lemon juice) in a glass beaker each.
  • Measure out 1 teaspoon of salt and at the same time tip in into the vinegar and start your 1st stop watch.
  • Measure out 1 teaspoon of salt and at the same time tip in into the water and start your 2nd stop watch.
  • Measure out 1 teaspoon of salt and at the same time tip in into the oil and start your 3rd stop watch.
  • Measure out 1 teaspoon of salt and at the same time tip in into the lemon juice and start your 4th stop watch.
  • As soon as the salt has fully dissolved in one of the beakers stop the stopwatch for that particular beaker.

Observations:  The oil didn’t dissolve at all, the lemon juice was in tiny pieces (almost dissolved). The vinegar was surprising because it was in bigger pieces than the water which  is not what I thought in my hypothesis. WIN_20160624_103134 (2)

Discussion:  The lemon juice was the quickest, it had nearly dissolved. This happened because lemon juice is very acidic and when an acid is strong it becomes more unstable therefore combining with other liquids to dissolve substances. The oil didn’t dissolve at all because it has no acid in it at all, so it is completely stable not allowing it to mix with other substances and dissolve things. Vinegar is also very acidic like lemon juice and water not so much. The only reason I can think of about why water was faster to dissolve than the vinegar is that the vinegar was a special type that has less acid in it or the temperature was different but it still make no sense.

Conclusion: The experiment was quite different to what I predicted while the oil didn’t dissolve like I said and the lemon juice was quicker but the water and the vinegar really surprised me, I predicted that the vinegar would be faster not the water. I don’t really know why the water worked better. Next time I would make sure all the liquids had the same time to dissolve the salt because that would change the results.

Bibliography:

Kindersley, Dorling, Wow! Science. , Penguin Books Australia, 27th of June 2011

Rice bran oil, 14th of June 2016, 18th of June 2016, https://en.wikipedia.org/wiki/Rice_bran_oil

What Is Lemon Juice Made Of? , 18th of April 2009, 18th of June 2016, http://www.lemon-info.com/2009/04/18/what-is-lemon-juice-made-of/

Acids, Bases, & the pH Scale. , 17th of June 2016,

http://www.sciencebuddies.org/science-fair-projects/project_ideas/Chem_AcidsBasespHScale.shtml2