ScienzFair™ Ideas - CHEMISTRY
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Remember that these project ideas and outlines are meant to help you complete your own science fair project. But it is DISHONEST and UNETHICAL to copy someone else's project work samples and submit them as if they were your own. That's called plagiarism and it's a fast way to get a failing grade. It's okay to do the same project as someone else, or review what others have done so you can make your project better, but DO NOT COPY and pretend it's your project. Someone is sure to spot the plagiarism!!
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pH Testing

•    Can we make a pH indicator from Red Cabbage?
        Preparing pH paper.

•    Are flowers suitable as a natural pH indicator?

•   What is the pH of common household items?

•    How do living tissues react to changes in pH?

Density

•    What is the density of water?  Does it change with temperature? How?

•    Compare the density of common household substances and provide a
        visual demonstration of the comparison.  

•    What factors affect the bouyancy of cans of soda pop?

•     Does the salt in ocean water affect bouyancy?

•    Demonstrate that the density of CO2 is greater than air.

Testing for Substances

•    Can we test for the presence of vitamin C?

•    What relative levels of vitamin C are in different citrus fruits?

•    Does sunlight affect the amount of vitamin C in orange juice?

•    What percentage of a vitamin C tablet is really the active ingredient?

•   Compare the calories in common foods such as various types of nuts,
        marshmallows, etc.  

•    Which soft drink has the highest level of caffeine content?

•    How much caffeine is contained in a tea bag?

•    Which brand of instant coffee has the most caffeine?

•    Which decaffeination method results in the most flavorful coffee?

•    Compare the amount of protein in different brands of milk.

•    Which foods eaten at school are the most nutritious?

•    How can we test for the presence of starch?  

•    Compare the amount of starch in assorted vegetables.

•    Which soft drinks contain the most sugar?

•    Are antacids effective in counteracting acid indigestion and heartburn?
•    Which antacid tablet has the most active ingredient
•    Which over-the-counter antacid is best at neutralizing stomach acid?

•    Which hair coloring product has the greatest amount of lead acetate?

•    What percentage of a chicken eggshell is composed of calcium carbonate?    
        Compare this percentage to that of other birds.     

Phase Changes - Freezing/Boiling

•    Will an ice cube melt faster in fresh water or salt water?  

•    Does shape affect how fast an ice cube will melt?

•    Does salt affect the freezing point of water? Do other substances such as
        Vinegar, Coke, Sugar and Milk affect the freezing point of water?

•    Does salt affect the boiling point of water?

•    Does the starting temperature of water affect how long it will take to freeze?

•    When water freezes does it expand or contract?  Why?

•    Why are most ice cubes cloudy and white, and how can you make clear ones?

•    What are the differences between ice cubes made of tap water and ice cubes
        made of distilled water?

•     How do different liquids (water, fruit juices, soft drinks, etc.) affect the
        sublimation of dry ice (CO2)?

•     Does air temperature affect the speed of sublimation for dry ice?

•    What happens when mothballs are heated?

Surface Tension

•    Can a metal object float on the surface of water?

•    Compare the surface tension of various household liquids.

•    How does the addition of different nutrients affect the strength of bubbles?

Cleaners/Detergents/Soaps

•    Does the composition of a soap solution have an effect on its surface tension?

•    Does soap and water remove grease better than just water alone?

•    Can we find out how much phosphorus is in the detergent we use?

•    Which tile cleaner is the best at removing shower stall soap scum?

•    Which window cleaner removes stains best?

•    Research and demonstrate the fundamentals of soapmaking and explain how
        soaps remove dirt and grease.

•    Is it possible to make soap at home as good as what is bought in the store?

•    What effect do common household detergents have on JELLO?

•    Which brand of detergent is the best stain remover?

•    Which type of fabric is cleaned best by a selected brand of wash powder?

•    Which cleaner is best for removing stains from cotton cloth?

•    Will dry cleaning solutions remove stains better than regular detergents?

•    Which brand of carpet cleaner is best for removing multiple stains?

•    Which toothpaste substance works best to whiten teeth?

•    Determine which common kitchen substances will clean pennies the best.

•    What is the effect of soap on bubble baths?
OXIDATION - RUSTING - DECOMPOSITION      

•    Which household solution will decompose an apple the quickest?

•    Can you produce methane or other fuels from rotting vegetation?

•    Which common household substance is most corrosive for zinc?

•    What is the effect of temperature on the corrosion of aluminum?

•    Which common metals will rust fastest in salt water?

•    What effect does water pH have on the rusting of nails?

•    What effects do chemical deicers have on automobies?

•    How can we prevent nails from rusting?  

•    What effects do common household acids have on different metals?

•    How effective are natural antioxidants in retarding soybean oil oxidation?

FLAMMABILITY

•     Does the color of a flame indicate its temperature?

•    Does the amount of available air affect how long a candle burns?

•    Can a burning candle determine the percentage of atmospheric oxygen?

•    Study the atmosphere and measure the percentage of oxygen in ambient air.

•    What elements are required to keep a fire going and how do fire extinguishers
        work to put out fires?  

•    Can you identify a metal by the flame color when it burns?

•    Which types of fabric are the most flammable?

•    How do fabric sprays affect flammability?

CRYSTALS

•    How does temperature affect the growth of crystals?

•    Will impurities affect the formation of crystals?

•    Will the presence of proteins affect the rate of crystalization?

•    What common household substances will crystallize?

CHROMATOGRAPHY

•    Demonstrate how basic methods of paper chromatography will allow the
        identification of different writing pens.

•    Can paper chromatography be used to identify pigmentation in spinach?

•    Can paper chromatography determine the content of colored candy coatings?

•    In separating liquids which is best, distillation or paper chromatography?

MISCELLANEOUS

•    How is colored glass made?

•    What effect does temperature have on the rate of a chemical reaction?

•   What is the realtionship between a substance's surface area and how
        reactive it is?  

•    Can a photosynthesis test be used to show which of two cactus plants was
        kept in darkness for 24 hours and which was kept in light?

•    Does temperature affect the pressure exerted by a gas?

•    How much CO2 is producted in a vinegar/baking soda reaction?

•    Demonstrate how to use CO2 to make a carbonated soft drink.

•    Would vegetable oils be a suitable replacement for diesel fuels?

•    Is it possible to remove the salt from ocean water so we can drink it?

•     Does sunlight affect the dyes used in colored paper? Does heat?

•    Can we determine if our tap water is hard or soft?

•    How does hardness of the water affect evaporation rate?

•     Which paints hold their color the best when exposed to the weather?

•    What effect does tempera paint have of various papers?

•    How does humidity affect human hair? Why does it have that affect?
•    Which is the effect of different shampoos on the tensile strength of hair?
•    How do natural substances affect human hair?

•    What is required to make homemade perfumes?

•    Compare rain and/or snow from different locations near your home for
        pollution. Determine if it is worse near larger cities and/or power plants.

•    Which household kitchen wrap is best to protect against seepage?

•    How do you make invisible ink? How can you read messages in invisible ink?

•     Explain the role of a catalyst and show how catalysts work.

•    What household substances can be used to make natural plastics?

•    What factors affect the rate of reaction between rennin and milk?

•     Compare the relative hardness of different types of nail polish.

•    What is the effect of swimming pool chlorine on bathing suit fabrics?

•    What factors affect how well a piece of cloth is dyed?

•   What effect does vinegar have on eggshells?  Why? Do other substances
        also have similar effects?

•    How well does a glucose solution move through the walls of  a chicken
        intestine and in which direction does it move the easiest?

•    Compare how rapidly chicken bones deteriorate when left in various
        household liquids such as vinegar, salt water, liquid detergent, etc.

•    Can a decalcified bone reabsorb calcium?

•    What effects do temperature changes have on chemoilluminescence?

•    Show how household vegetables and fruits can be used to generate electricity.
        (Also see our Electricity & Magnetism category)

•    Demonstrate how electricity can break down water into hydrogen & oxygen.
 

•    Demonstrate and compare homemade glues such as those made from milk
        or flour.  Which is stronger and most durable?
 

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