Tuesday, April 8, 2014

Acids, Bases, and pH

View this video and post a paragraph statement that highlights the key points.

11 comments:

  1. I learned how to calculate the pH of a substance this how.
    pH = -log [H+}
    pH = -log [1 in 10,000,000]
    pH = -log [1*10 to the negative seven
    which equals 7
    pH stands for pour of hydrogen
    are there liquids that do not have any water in them.
    E.D.B

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  2. This pH thing was a little confusing, but I understood that anything with a pH under 7 was acidic and anything higher than 7 was a base. I was interested when he was talking about the oceans becoming acidic. When carbon dioxide increases in the air, it mixes with the ocean which makes carbonic acid. pH stands for the power of Hydrogen. Another words it stands for the amount of hydrogen. pH could also stand for the power of Hydronium or just plain and free hydrogen ions. I would like a better explanation of the equation of pH. I don't understand what the -log is for...
    MJS

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  3. pH is used to calculate how acidic a substance is. pH stands for Potential Hydrogen, meaning the amount of hydrogen. Normal water has a pH of 7. a pH of 7 is stable, and is called a neutral pH. Objects with higher pH are more basic, while objects with lower pH are more acidic. When a hydrogen atom separates from an H2O Molecule and attaches to another H2O molecule, it creates H3O: Hydronium, and OH: Hydroxide. The pH in our oceans is becoming more acidic. This is because the carbon dioxide and water being combined are making carbonic acid in the ocean.
    ADC

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  4. I learned that Ph stands for power of hydrogen but in class we were told that it stood for potential hydrogen so that was a little confusing but I did like the math it was as easy as two plus two like this how you do it
    pH = -log [H+}
    pH = -log [1 in 10,000,000]
    pH = -log [1*10 to the negative seven
    which equals 7
    see that was easy
    I also noticed that the water acidity was getting more and more acidic but we are fine because we are green on the map witch means out acidity is and 6-7
    JBG

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  5. Here are 13 different highlights from this video.
    1. pH measures acidity levels.
    2. If you move a protein to high or too low on the pH scale, it will start to denature.
    3. Oxygen is really greedy when it comes to electrons. It pulls electrons towards it.
    4. The hydrogen bond when two water molecules combine is between the positive hydrogen, making it partially positive.
    5. Hydrogen atoms can be detached from a water molecule and latch on to a different one, which is called hydronium. (H3O).
    6. H3O has a positive charge.
    7. A water molecule that is left with only one hydrogen and one oxygen is called a hydroxide ion.
    8. pH stands for "power of hydrogen".
    9. It is 1 in 10 million chance that hydronium will occur.
    10. The power of hydrogen is equal to the negative log of the hydrogen ion concentration. (pH=-log[H+]).
    11. If you have a pH higher than 7 it is a base.
    12. If you have a pH lower than 7 it is an acid.
    13. If you have a pH of 7 it is neutral. (That would be distiller water.).
    JMJ

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  6. PH stands for power of hydrogen/potential hydrogen. The PH measures the amount of "extra" hydrogen it gave or took. Any acid can become a base if you give it enough hydrogen, and vice-versa with bases. The equation (PH=-log[H+]) Was easier than the other equations. I understood that under 7 was acid and above 7 was base, but what is 7!?!?
    g.j.g.

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  7. This video described acids, bases, and pH. PH is the power of hydrogen. He explained that in a water molecule, that there is a polar covalent bond between the oxygen and hydrogen atoms. He demonstrated how a hydrogen bond can be so strong,between two water molecules, that it robs a hydrogen atom from the other water molecule, leaving a positive (+) hydronium molecule (H3O) and negative (-) hydroxide (HO). The frequency of the hydronium molecule defines pH. 1 in 10,000,000 occurrence of hydronium = a pH of 7 using a base 10 logarithm scale. 7 represents a neutral pH. As the occurrence of hydronium increaces, pH decreases (meaning the solution is more acidic), and vice versa.
    JJP

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  8. I learned that a hydronium molecule has three hydrogen atoms, that
    pH=-log[H+], and that pH stands for power of hydrogen. also, anything higher than 7 on the pH scale is a base, and anything lower than 7 is an acid.
    CJB

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  9. I learned that the oceans are getting more and more acidic because of the carbon in the air mixing with the oceans.
    I find it funny that in this video it says that pH stands for power of hydrogen but on the brain pop video of "acids and bases" it says that it stands for potential of hydrogen. I was a wondering which one was right?
    bmm

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  10. Most people's understanding of pH is that water has a pH of 7, and everything else is usually lower. It's important that the pH levels stay the same. Hydronium is an H3O molecule, it is made when one H2O molecule, gives the other one an oxygen atom. The pH is equal to the negative log of the hydrogen ion concentration.The negative log ha a 1 in 10,000,000 chance of being a hydronium. The pH of 7 is neutral, a value grater than 7, is a base. any value less than 7, is going to be an acid. L.G.S.

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  11. I found out that pH stands for power of hydrogen I thought it stood for Potential of hydrogen, well that is what they said on the Brain pop. I found it interesting how he said we have one in a million chance to have Hydronium. The equations are pH= - log [H+] and the other equation is pH= - log [1 in 10 million] and the other one is pH= - log [1x10]. pH= 7. pH=7 is neutral. If the pH is bigger than seven it is going to be abase if it is smaller than seven it is going to be a acid. Hydrocloric acid is the most popular acid that everybody is familiar with, we have in our bodies. When you puke and feel that your throat starts to sting it is probably because of the Hydrocloric acid. A.P.H

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