The Rate of Reaction When Dissolving Sugar Introduction I have been asked to perform an investigation on the length of time it takes for a certain amount of sugar to dissolve in a certain amount of water at different temperatures. I will investigate whether the time taken at one temperature and another will be the same, quicker or slower using scientific methods. Identifying Key Factors ======================= The factors that would affect the dissolving rate are: - · Volume of water The larger the volume of water, the quicker the sugar will dissolve because there is more particles for the sugar molecules to collide with. · Mass of sugar The more sugar there is the dissolving rate will be slower as there is more molecules to collide with the water particles. · Size of sugar particles The bigger they are the slower they will dissolve. · Temperature The higher the temperature the quicker the sugar will dissolve The variable I am going to change is temperature. I will keep all other factors constant to make the experiment fair and so the results are reliable. Reasons for doing a pre-test I am going to perform a pre-test so that I have an idea of the quantities of Sugar and water I will need to use in my actual experiment. Doing a pre-test means I will get a more accurate result when it comes to do the actual experiment. Pre-test method Apparatus · Glass Beaker · Measuring cylinder · Tripod · Bunsen Burner · Stirring Rod · Thermometer · Stopwatch · Heat proof mat · For safety: Goggles · Weighing scales · Gather equipment and set up as shown below: · Choose your temperatures (I am going to perform the pre-test with the temperatures 20°C, 40°C and 60°C) · Measure 10g of sugar and 100cm³ of 20°C water · Pour the water and sugar into the glass beaker and start the clock.
It is important however to note that the NH4 and K ions are still in
Investigating Rates of Reactions My aim is to investigate what factors affect the rate of reaction between magnesium and hydrochloric acid. The factor that I will be focusing on is the concentration of Hydrochloric acid. [IMAGE]Reaction Equation: Mg (s) +2HCl (aq) = MgCl2 (aq) +H2 (g)
As can be seen, there is a point at which the rate of reaction becomes
and it is necessary for the back of the gas syringe to be taken out,
For the test for lipids I can use two tests. The first test being the
that I conduct my test in the same place each time and that I avoid
Investigation looking At the Speed of Reactions Introduction The aim of this experiment is to find out how a variable can affect the results from a scenario set up in scientific environment. The experiment is to see how a certain variable will affect the amount of Gas produced from a Calcium Carbonate and Hydrochloric Acid Reaction. The Science Calcium Carbonate is a generally white or colourless mineral that is translucent.
The test can be done at any time. It is usually done after resting at least
The researcher will record the raw scores and calculate the standard deviation for both the pretest and the posttest. A dependent T-Test will be used at the .05 level of confidence to decide if there is statistically significant difference between the mean scores of the two tests given.
« Surface Area - If the reactant has a large surface area, there is a
The main problem being investigated in this experiment is the different rates the color on a skittle dissolves when sugar is added to water. The experiment was to determine which amounts of sugar would affect the rate at which the color on a skittle dissolves. According to Little Bins for Little Hands, skittles are supposed to be able to dissolve in water (Littlebins, 2016). I did not know water could help the skittles dissolve faster, and I thought the sugar I added would help them dissolve at a faster rate. This experiment really caught my eye because I was personally really intrigued as to how the amount of sugar would affect how fast the color on a skittle would dissolve. I’ve never heard of anyone doing this experiment so I wanted to test it for myself to see what kind of results I would get. Whenever the skittle was dropped into the water it would sizzle, and the process of dissolving would occur. My hypothesis was “If the amount of sugar is increased, then the rate it takes for the color on a skittle to dissolve will decrease.” The experiment was all around very fun, however the results I collected were not what I was anticipating.
The rationale for this science experiment was the outcome of how long our cut flowers would last if sugar was added to its water.This experiment can impact many people who enjoy flowers in their home but don’t have the money or time to replace them often. In one of the studies researched scientists observed that the cut flowers (roses) benefited at every concentration of added sugar. The maximum days that the flowers lasted was about 14 days. The article states that when cut flowers are put in a vase they consume water that contains more acid faster. The vase that contained the sucrose lasted five more days then the vase with just distilled water. Although other compounds were tested in this study the one that held the most promise was the sucrose. This article is relevant to this experiment because it shows that carbohydrates can benefit the longevity of the cut flowers which is what we are testing.
In my opinion I felt this article was very informative. There were a variety of tests that
We did a pre-test in the same way in which the experiment is to be
Second I will describe what these tests are used to figure out and how they are carried out.