Conclusion In the experiment held various sizes of hydrogen gas bubbles, which were made through pumping hydrogen gas in a soap mixture, then later ignited with fire to see the combustion and how long it last; our hypothesis was any bubble that measured under or equal to 1mm would not have any combustion, therefore no combustion time. Through the several trials that were held for each size bubble its been proven that all bubbles under 1mm had no combustion time and bubbles around 1mm to 3mm had had at the rang of a half second combustion time to an occasional 1-2 . Bubbles that were 4mm and higher though had a longer combustion time at the most 8 seconds. The complications we encountered through the experiment was definitely measuring the bubbles accurately. To measure them we first tried to use a ruler against the container the soap mixture was in while we pump hydrogen gas in and make the closest size to the millimeter we were on. Then we went back and redid the measuring by using graphing paper the has millimeter long boxes so we could wrap it around the container we had, so we could get way more accurate measuring. Another measuring problem we had was timing the experiment as accurately as we could, so that’s why we did three trials each for each size bubble. Through the experiment we learned how energy released appears as heat, light, sound , and kinetic energy, similar to a combustion engine in a car. Therefore using hydrogen could be used as an alternative
The first being the two synthesis reactions, within synthesis there was also one combustion. Next there were two decomposition reactions. The next type of reaction we saw was two single displacement. Lastly, there were three double displacement reactions.
During this experiment, my lab partner (Alya Abourezk) and I had no major source…
bicarbonate decomposed .32g and transformed into carbon dioxide, water vapor, and sodium carbonate.
1g zinc, 13 drops Hydrochloric acid, well plate
We believe that when a metal meets an acid it will bubble due to the hydrogen gas being released.
Little bubbling halfway through and pieces of metal turned a black-ish color.
Zn + 2HCl --> ZnCl2 + H2
Gather a gram of zinc and a drop of hydrochloric acid
Place the zinc into a well plate…
The Earth's atmosphere has remained much the same for the past 200 million years. The pie chart shows the proportions of the main gases in the atmosphere.
It is clear that the main gas is nitrogen. Oxygen - the gas that allows animals and plants to respire, and fuels to burn - is the next most abundant gas. These two gases are both elements and account for about 99% of the gases in the atmosphere.
The remaining gases, such as carbon dioxide, water vapour and noble gases such as argon, are found…
When bonds are broken and new ones are formed a chemical change occurs. The following are indicators of chemical changes:
Change in Temperature
Change in Color\
Noticeable Odor (after reaction has begun)
Formation of a Precipitate
Formation of Bubbles
Note: When two or more reactants are mixed and a change in temperature, color, etc. is noticed, a chemical reaction is probably occurring. These are not definite indicators; a chemical reaction may not be occurring. A change in color is not always…
and label a water molecule including the relevant charges.
2. Explain why water molecules are polar.
Oxygen has a stronger affinity (electronegativity) for electrons than hydrogen, therefore, the electrons spend more time hovering around the oxygen nucleus. This gives the oxygen a slightly negative charg), the hydrogen a slightly positive charge. This phenomenon creates a polar molecule, a molecule that has positive and negative charges on it.
Mini Lab #1: Penny Lab
In this mini-lab, you…
keep it simple science
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Compounds & Reactions
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sunlight absorbed by pigment chlorophyll, energy converted to chemical energy in glucose.
Glucose – carbohydrate: high-energy compound of C, H and O.
6CO2(g) + 6H2O(l) + energy C6H12O6(aq) + 6O2(g)
Petroleum consists of cruide oil and natural gas, formed of remains of single-celled marine organisms.
Quick burial, decay by bacteria without presence of oxygen, millions of years of heat and pressure caused by overlaying sediments convert to petroleum.
Mixture of 300 hydrocarbons, sulfur and…
Chemical Properties describe the reactivity of a substance. i.e. how a substance react with another substance
ability to burn; combustion(flame, heat, light)
flash point; temperature needed to ignite flame
behaviour in air; tendency to degrade, react or tarnish
reaction with water; tendency to corrode or dissolve
reaction with acids; corrosion sometimes bubble formation
reaction with heat; tendency to melt or decompose
reaction to red and blue litmus; red—acid, blue—base no colour change…
mass and occupies space. matter can be organized into pure substances and mixtures.
pure substance: cannot be broken down into simpler substances.grouped into elements or compounds.
element: substances composed of only one kind of atom. ie. hydrogen, oxygen, and gold.
compound: substances composed of two or more elements chemically combined. i.e. water, and sugar.
mixture: can be separated into component parts by physical means.
Physical changes: a substance changes in form but not…