Most hard chemicals must be liquified in water or solvents before they have the right to be used. Knowing the best temperature because that dissolving each certain chemical can assist us save time and also energy in the dissolving process.

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Scientists frequently perform their own tests in order to learn about the result of temperature top top the price of dissolving and also create a graph the can assist them because that future reference.


In this project, friend will research the effect of temperature top top the price of dissolving any specific chemical in water. The chemical the you choose can be among the chemistry that are low hazard and can be discovered at home. Salt, baking soda, citric acid, and also sugar space some an excellent examples. Friend may obtain other chemistry such together copper sulfate, Calcium chloride and also lime locally. After performing necessary experiments you must create a graph to display the rate of dissolving in various temperatures.


This job guide consists of information that you need in bespeak to begin your project. If friend have any kind of questions or need an ext support around this project, click on the “Ask Question” button on the peak of this page to send me a message.

If you are brand-new in doing science project, click on “How come Start” in the key page. Over there you will find valuable links that describe different types of science projects, scientific method, variables, hypothesis, graph, abstract and all other general basics the you should know.

Project advisor

Information Gathering:

Find out around dissolving together a molecular level interaction in between solids and also liquids. Friend may also learn around some connected subjects such together the impact of polarity in dissolving and also learn that ionic substances can only be liquified in a polar fluid such together water and non-ionic substances can only be liquified in non-polar liquids such as acetone. Review books, magazines or ask specialists who could know in order come learn about the methods that you may test the rate of dissolve in particular temperatures. Store track of whereby you obtained your information from.

The complying with are samples of info that you might find.

Ionic solids (or salts) contain confident and an adverse ions, i beg your pardon are organized together through the solid force of attraction between particles v opposite charges. Once one of this solids disappear in water, the ion that form the solid room released into solution, whereby they become associated with the polar solvent molecules.



Why is it important to understand the temperatures that maximize solubility because that each substance?

Solid chemicals perform not react on each other. With exception of explosives, all various other chemical reactions room done v liquid chemicals. You first make a equipment of each ingredient, reaction the solutions and also then you different the products by methods such as crystallization, filtration or precipitation.

In all such reactions, us attempt to use the minimum quantity of water since later we have to remove the overfill water. Removing the overfill water needs time, fuel and other costs linked with separation process.

By learning the temperature in i beg your pardon a substance has actually the highest possible solubility we can avoid overabundance water and related prices in chemical reactions and also minimize the manufacturing cost.

Question/ Purpose:

What do you desire to find out? write a declare that explains what you desire to do. Use your observations and also questions to compose the statement.

The function of this task is to learn exactly how temperature affects the price of dissolving of a specific solid in a certain liquid.

More specifically I will examine the impact of temperature on the rate in which table salt or absent salt disappear in water.

Similar procedures have the right to be used to determine the result of temperature ~ above the rate of dissolve for various other solids and also other liquids.

Identify Variables:

When girlfriend think you know what variables may be involved, think around ways to adjust one in ~ a time. If girlfriend change more than one at a time, you will certainly not understand what change is leading to your observation. Sometimes variables room linked and work with each other to cause something. At first, shot to select variables that you think act separately of every other.

The independent variable (manipulated variable) is the temperature. (0ºC to 100ºC)

The dependent variable (responding variable) is the rate in i beg your pardon salt (a solute) dissolves in water (a solvent).

Controlled variables are air pressure and also other environmental factors.

Constants are:

The form of waterThe form of saltExperiment methodExperiment locationTools and Instruments offered in experiments


Based on her gathered information, make an educated guess about what species of things impact the mechanism you are working with. Identify variables is necessary prior to you have the right to make a hypothesis.

Following is a sample hypothesis:

The rate of dissolve salt in water will rise by temperature. My hypothesis is based on my an individual observations that heat accelerates dissolving.

Experiment Design:

Design one experiment to test every hypothesis. Make a step-by-step list of what friend will carry out to answer each question. This list is referred to as an experimental procedure. For an experiment to give answers you can trust, it must have actually a “control.” A manage is second experimental attempt or run. That is a separate experiment, done specifically like the others. The only difference is the no speculative variables space changed. A control is a neutral “reference point” for comparison that enables you to view what an altering a variable does by comparing it to not changing anything. Dependable controls are sometimes very hard come develop. They have the right to be the hardest part of a project. There is no a control you cannot be certain that changing the variable reasons your observations. A series of experiment that consists of a control is dubbed a “controlled experiment.”


Dissolving rate of salt in water at various temperatures.

Introduction: The price at which absent salt dissolves in water at 11 various temperatures is observed.


Label 11 beakers with numbers 0, 10, 20, 30, 40, 50, 60, 70, 80, 90 and also 100 to stand for the test temperatures in which friend are experimentation the dissolving rate. Systems are levels of Celsius.Prepare 11 little plastic bags v 100 grams absent salt crystals in every bag.Prepare enough amount of ice water (0ºC) in a different container. Include 200 ml water come the beaker labeling 0. Add 100 grams of rock salt to the water and stir it for 5 minutes.Carefully separate the continuing to be salt (whatever is not dissolved in water), then dried it and weigh it come see just how much of salt did no dissolve in water. Then subtract the from 100 to determine the amount of salt dissolved in water. Document your results.Prepare 200 ml water in ~ 10ºC. You might need to adjust the temperature by including some ice water or some hot water to continual tap water to execute this. Add 100 grams of rock salt to the water and also stir it because that 5 minutes.Carefully separate, dry and also mass any type of un-dissolved salt. Subtract it from 100 to recognize the amount of liquified water. Document your results.Repeat this experiment for 20ºC, 30ºC, 40ºC, 50ºC, 60ºC, 70ºC, 80ºC, 90ºC, and 100ºC waters. Use an electric heater to heat up the water as needed.

Your results table will look like this:

Amount the salt dissolved in water at different temperatures

Water TemperatureSalt dissolved in 200ml waterDissolving rate
0……… grams

Use the temperature column and also dissolving rate shaft of your results table to attract a line graph.

Notes/ Remarks:

To separate continuing to be un-dissolved crystals in a beaker, you might use a filter file and a funnel. Coffee filter works fine.You may make your dimensions in the American system instead of the metric system. For instance instead that Celsius degrees, you might use Fahrenheit degrees. You may need come make vital adjustments if you choose to execute it that way.You might perform similar experiments on any type of other water soluble substance.

Make a graph:

When your results table is ready, use it to make a bar graph. Friend will just use the an initial and the critical columns of your table to draw a graph. In this way your graph will display the relation in between the temperature and also the solubility.

Make one upright bar for each of the temperature you test. For example if you are testing four different temperatures, you will have 4 bars. The elevation of every bar to represent the solubility rate at each details temperature. For instance you may use a 20″ bar because that 20% solubility.

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Make sure you write the temperature listed below each bar. Likewise write the solubility rate above or over each bar.