The aim of this experiment was to show how dissolving of substances is affected by temperature.
Biological Investigation: Solubility
Introduction
The aim of this experiment was to show how dissolving of substances is affected by temperature.
Research Question
Does temperature affect how quickly a substance dissolves in water?
Hypothesis
When we add salt and sugar seperated into water with two different temperatures,then the substances will dissolve faster in the water with the higher temperature.
Hypothesis Explanation
The ability for a given substance, called a solute, to dissolve in a solvent is called solubility. A couple of factors can influence solubility, such as temperature.Solubility rises with the increase of temperature - this means that the warmer the temperature is, the solute will dissolve in a solvent more quickly.
Compounds
30g sugar 30g salt
1.8L water
Variables
time (dependent)
temperature oC of water (independent)
Apparatus
1 baguette
2 250mL beakers
1 electric kettle
1 apron
1 thermometer (100°C)
1 stopwatch
1 scale (error: ±0.1g)
1 spoon
1 pencil and paper (to record data)
Method
Put on apron.
Take one beaker and pour 150mL of water into it. Measure the temperature of the water and record it.
Prepare your stopwatch, while measuring out 5g of salt on your scale. With your spoon, add the salt to the beaker. At the same time, start your stopwatch, and stir the water with the baguette until it dissolves. Stop your stopwatch when the salt dissolves. Record your data. Repeat steps 2-4 two more times.
Now, boil water in kettle and with that water, repeat steps 2-5. Repeat steps 2-6, only with sugar instead of salt.
With your raw data, design and construct a table with your results. Design and draw a graph based on your results.
Results from the Experiment
(raw data on attached paper)
Abbildung in dieser Leseprobe nicht enthalten
Frequently asked questions about Biological Investigation: Solubility
What is the aim of the experiment?
The aim of the experiment is to show how the dissolving of substances is affected by temperature.
What is the research question?
The research question is: Does temperature affect how quickly a substance dissolves in water?
What is the hypothesis?
The hypothesis is: When we add salt and sugar separated into water with two different temperatures, then the substances will dissolve faster in the water with the higher temperature.
What is solubility?
Solubility is the ability for a given substance, called a solute, to dissolve in a solvent.
What factors can influence solubility according to the text?
According to the text, temperature can influence solubility.
What compounds are used in the experiment?
The compounds used are 30g of sugar, 30g of salt, and 1.8L of water.
What are the variables in the experiment?
The dependent variable is time, and the independent variable is the temperature of the water in degrees Celsius (°C).
What apparatus is used in the experiment?
The apparatus includes a baguette, two 250mL beakers, an electric kettle, an apron, a thermometer (100°C), a stopwatch, a scale (error: ±0.1g), a spoon, and a pencil and paper to record data.
What are the steps in the method?
The method involves: putting on an apron; pouring 150mL of water into a beaker and measuring its temperature; preparing the stopwatch and measuring out 5g of salt; adding the salt to the beaker, starting the stopwatch, and stirring until the salt dissolves; recording the data and repeating the steps two more times; repeating the steps with boiled water; and repeating the entire process with sugar instead of salt; and designing tables and graphs to represent the results.
What results are expected from the experiment?
The results include raw data on an attached paper and a table summarizing the outcomes of the experiment.
What is Table 1 about?
Table 1 is about the outcomes of the experiment.
- Quote paper
- Felix Dyrek (Author), 2008, Does temperature affect how quickly a substance dissolves in water?, Munich, GRIN Verlag, https://www.grin.com/document/159587
