Heyy everyone!! :)
So when i was just looking through all my srp photos, i realised that i forgot to post the ones of the litmus strips- showing the chemical characteristics (ph, alkalinity, chlorine, stabiliser content) of the different liquids in the measuring cups, for week 2. I wanted to take pictures of them to prove that these chemical characteristics don’t change as evaporation is occurring. And i was correct!! So anyway these are the pics!! From left to right, the strips are for measuring cups 1,2,3 and 4 respectively. They are below the graph
Ok so a while a go (i forgot to write it on here! Oops! ) i also decided that for the results section of my report, i should scrap the results for colour and appearance. I mean, whilst i was conducting the experiment i thought it would be interesting to see and note how this changed over the 15 day, experimental period, but as ive been doing the report ive realised that this really has nothing to do with the evaporation of liquids from the 4 glasses. Also, im only gonna talk about all the chemical characteristics briefly, just to show that they haven’t changed over the period and that they don’t affect the rate and level of evaporation.
But so far, the report is going really, really well!! Im more than half way through it, which is ahead of where i where i wanted to be at this time!!! I thought it would be good to include one of the graphs that im using in my report on here, because it is sort of like a summary graph and would be a nice finishing touch to the results ive posted on here. So yeah this is ONLY 1 graph, all the other graphs and tables you will see in my report!! So this graph pretty much just shows the volume of liquid in each of the four measuring cups over the 15, day experimental period. As you can see, as the time is increasing the water level is decreasing. So anyway, here is the graph:
here its for measuring cups 1,2,3,4 respectively
Ok well i also thought id post on here some of the info and more that i put in my introduction about plain water and chlorine water. I realised that i hadn’t actually posted much research of that on here, so here it is:
Plain, tap water:
Water is a special chemical substance consisting of two atoms of hydrogen and one atom of oxygen.
The hydrogen atoms are "attached" to one side of the oxygen atom, resulting in a water molecule having a positive charge on the side where the hydrogen atoms are and a negative charge on the other side, where the oxygen atom is.
Since opposite electrical charges attract, water molecules tend to attract each other, making water kind of "sticky." The side with the hydrogen atoms (positive charge) attracts the oxygen side (negative charge) of a different water molecule.
Here are some interesting facts about water:
Water is called the "universal solvent" because it dissolves more substances than any other liquid. This means that wherever water goes, either through the ground or through our bodies, it takes along valuable chemicals, minerals, and nutrients.
Pure water has a neutral pH of 7, which is neither acidic nor basic.
· Water is unique in that it is the only natural substance that is found in all three states -- liquid, solid (ice), and gas (steam) -- at the temperatures normally found on Earth. Earth's water is constantly interacting, changing, and in movement.
· Water has a high specific heat index. This means that water can absorb a lot of heat before it begins to get hot. This is why water is valuable to industries and in your car's radiator as a coolant. The high specific heat index of water also helps regulate the rate at which air changes temperature, which is why the temperature change between seasons is gradual rather than sudden, especially near the oceans.
· Water has a very high surface tension. In other words, water is sticky and elastic, and tends to clump together in drops rather than spread out in a thin film.
Water is a special chemical substance consisting of two atoms of hydrogen and one atom of oxygen.
The hydrogen atoms are "attached" to one side of the oxygen atom, resulting in a water molecule having a positive charge on the side where the hydrogen atoms are and a negative charge on the other side, where the oxygen atom is.
Since opposite electrical charges attract, water molecules tend to attract each other, making water kind of "sticky." The side with the hydrogen atoms (positive charge) attracts the oxygen side (negative charge) of a different water molecule.
Here are some interesting facts about water:
Water is called the "universal solvent" because it dissolves more substances than any other liquid. This means that wherever water goes, either through the ground or through our bodies, it takes along valuable chemicals, minerals, and nutrients.
Pure water has a neutral pH of 7, which is neither acidic nor basic.
· Water is unique in that it is the only natural substance that is found in all three states -- liquid, solid (ice), and gas (steam) -- at the temperatures normally found on Earth. Earth's water is constantly interacting, changing, and in movement.
· Water has a high specific heat index. This means that water can absorb a lot of heat before it begins to get hot. This is why water is valuable to industries and in your car's radiator as a coolant. The high specific heat index of water also helps regulate the rate at which air changes temperature, which is why the temperature change between seasons is gradual rather than sudden, especially near the oceans.
· Water has a very high surface tension. In other words, water is sticky and elastic, and tends to clump together in drops rather than spread out in a thin film.
Chlorine:
· Chlorine is an element used in industry and found in some household products.
· Chlorine is sometimes in the form of a poisonous gas. Chlorine gas can be pressurized and cooled to change it into a liquid so that it can be shipped and stored. When liquid chlorine is released, it quickly turns into a gas that stays close to the ground and spreads rapidly.
· Chlorine gas can be recognized by its pungent, irritating odor, which is like the odor of bleach. The strong smell may provide an adequate warning to people that they have been exposed.
· Chlorine gas appears to be yellow-green in color.
· Chlorine itself is not flammable, but it can react explosively or form explosive compounds
· Chlorine is an element used in industry and found in some household products.
· Chlorine is sometimes in the form of a poisonous gas. Chlorine gas can be pressurized and cooled to change it into a liquid so that it can be shipped and stored. When liquid chlorine is released, it quickly turns into a gas that stays close to the ground and spreads rapidly.
· Chlorine gas can be recognized by its pungent, irritating odor, which is like the odor of bleach. The strong smell may provide an adequate warning to people that they have been exposed.
· Chlorine gas appears to be yellow-green in color.
· Chlorine itself is not flammable, but it can react explosively or form explosive compounds
with other chemicals such as turpentine and ammonia.
Its really weird to know that that is the chemical in a lot of swimming pools, and in mine!!
References:
http://www.periodic.lanl.gov/elements/17.html
http://www.chemlink.com.au/caustic_oz.htm
http://www.ozh2o.com/h2chem.html
xoxo Mira
http://www.periodic.lanl.gov/elements/17.html
http://www.chemlink.com.au/caustic_oz.htm
http://www.ozh2o.com/h2chem.html
xoxo Mira
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