What does cabbage juice have to do with science? 5/7/17
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Summary:
A solution is a liquid that contains a solid that is so spread out that it is no longer visible to the naked eye. A base is high on the pH scale because creates a lot of hydroxide ions when mixed with water. Bases are extremely bitter and a common example of a base would be soap. On the other hand an acid creates a ton of hydrogen ions and is lower on the pH scale. The pH scale measures how acidic or basic a solution is, 14 being the most basic and 1 being the most acidic. Water is neutral meaning it is smack dab in the middle of the pH scale. If you have two beakers containing clear liquids, but one is an acidic and the other is a base how would you tell the difference. We would use a simple piece of litmus paper. Litmus dye is taken from lichen and put on paper. Adding acid to the mix would have red litmus that would be for testing bases and vise versa for testing acids.
S&EP- Conducting Investigations:
To start off the week we conducted an experiment using cabbage juice. We added different solutions to test the pH level and see the differences between a base and an acid. The acid started off around a 5 or 6 on the pH scale which is an acid, but it is not extremely acidic. As for the base it was an 8 or 9 which is not a strong base. Each time we added more base or acid to make the solution more concentrated the color changed. The acid went from a violet to a vibrant pink while the base went from teal to a lime green. This color change helped me understand how to "read" the pH scale. In addition to this, I learned that an acid could turn into a base and go back countless of times. You can add an acid to base to bring it towards the lower part of the pH scale. This experiment helped me see how the pH scale works, the difference between bases and acids, and how a solution can go back and forth from being a base and acid due to its concentration.
XCC-Cause & Effect:
I noticed so many cause and effect relationships during the week while playing legends of learning. First of all, a chemical reaction itself has a cause and an effect. You start off with two or more compounds, they mix, and are rearranged to form a new product or products. The number of each atom do not change, but the product(s) are not the same as what you started with. Another cause and effect relationship I observed was when I realized that a catalyst that it takes less energy to create a chemical reaction if a catalyst is involved. I know what you are thinking, "If a catalyst speeds up the reaction, why does it take less energy?" Since a catalyst speeds up the reaction the other components do not need as much energy to make the reaction occur. The game confirmed that synthesis is an exothermic reaction while decomposition is an endothermic reaction. This is because breaking bonds requires energy and creating bonds release energy. Lastly, acids donate protons and increases the concentration of H3O + ions while bases take protons and decrease the concentration of H3O + ions which is why acids are lower on the pH scale and bases are higher.
Multiplier:
This week I was a mutant, to be more specific a wanderer because I always shared information I found with my team when we were playing on legends of learning.
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| Science & Biology |
Summary:
A solution is a liquid that contains a solid that is so spread out that it is no longer visible to the naked eye. A base is high on the pH scale because creates a lot of hydroxide ions when mixed with water. Bases are extremely bitter and a common example of a base would be soap. On the other hand an acid creates a ton of hydrogen ions and is lower on the pH scale. The pH scale measures how acidic or basic a solution is, 14 being the most basic and 1 being the most acidic. Water is neutral meaning it is smack dab in the middle of the pH scale. If you have two beakers containing clear liquids, but one is an acidic and the other is a base how would you tell the difference. We would use a simple piece of litmus paper. Litmus dye is taken from lichen and put on paper. Adding acid to the mix would have red litmus that would be for testing bases and vise versa for testing acids.
S&EP- Conducting Investigations:
To start off the week we conducted an experiment using cabbage juice. We added different solutions to test the pH level and see the differences between a base and an acid. The acid started off around a 5 or 6 on the pH scale which is an acid, but it is not extremely acidic. As for the base it was an 8 or 9 which is not a strong base. Each time we added more base or acid to make the solution more concentrated the color changed. The acid went from a violet to a vibrant pink while the base went from teal to a lime green. This color change helped me understand how to "read" the pH scale. In addition to this, I learned that an acid could turn into a base and go back countless of times. You can add an acid to base to bring it towards the lower part of the pH scale. This experiment helped me see how the pH scale works, the difference between bases and acids, and how a solution can go back and forth from being a base and acid due to its concentration.
XCC-Cause & Effect:
I noticed so many cause and effect relationships during the week while playing legends of learning. First of all, a chemical reaction itself has a cause and an effect. You start off with two or more compounds, they mix, and are rearranged to form a new product or products. The number of each atom do not change, but the product(s) are not the same as what you started with. Another cause and effect relationship I observed was when I realized that a catalyst that it takes less energy to create a chemical reaction if a catalyst is involved. I know what you are thinking, "If a catalyst speeds up the reaction, why does it take less energy?" Since a catalyst speeds up the reaction the other components do not need as much energy to make the reaction occur. The game confirmed that synthesis is an exothermic reaction while decomposition is an endothermic reaction. This is because breaking bonds requires energy and creating bonds release energy. Lastly, acids donate protons and increases the concentration of H3O + ions while bases take protons and decrease the concentration of H3O + ions which is why acids are lower on the pH scale and bases are higher.
Multiplier:
This week I was a mutant, to be more specific a wanderer because I always shared information I found with my team when we were playing on legends of learning.
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