acids and bases

What makes an acid an acid?  Well after I was asked this question and I went online and looked up what the definition of an acid was.  Well the term acid comes from the Latin word acere which means sour.  It named a couple of acids and one of them was vinegar which we used in our lab recently.  See in our experiment we mixed acids and bases.  What we did was take the vinegar which is the acid and the tablets which is the bases.  See when the bases are mixed with the acids it becomes less and less of an acid as the article said that i read.  That's exactly what happened in this experiment we did.  When we took the Ph of the  vinegar in the beginning it showed that it was an acid well the numbers changed once we added the tablets so instead of it staying an acid it changed into more of a base.

acids in your stomach lab

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Water article

http://goanimate.com/movie/0kdrlJvVpfbg?utm_source=linkshare&uid=0jymuYHkOtuw

Water Properties

Surface Tension on a Penny


Recently we did a lab about the properties of water.  What we did was take water and used it in it's different forms and structures. The one that I found most interesting is the lab with the penny.  How did that little penny hold so many drops!!!  After I watched he video about the water properties I found that a little penny like that can hold so many drops by surface tension.  Surface Tension means the energy needed to increase the surface area of a liquid by a given amount.  In this case it means that the surface area expands the surface area so that it makes a spherical form.  So when you put the drops on the penny it makes a bubble like structure on top of the penny.

Second we took a string and water and put another glass at the other end and poured the water down the string. I thought it was crazy how it just stuck the string and ran down into the glass.  So I went to the video again and I couldn't figure out what property it was but then as I watched it over and over again I found it similar to cohesion.  Cohesion means an attractive force between similar molecules in the same phase.  See on the video it uses water going up a tree to get water to its leaves as an example.  Well this is the same thing its just that it is running down the string instead of up the roots.  Cohesion allowed the water to stick to the string and run down into the glass.

CANCER!!!

In this clinical trial I learned all about my aunt's disease.  It's liver cancer!!!  They are doing this trial to obviously find the cure.  The way they do it is to get a certain amount of people on the medication and then sadly they see who lives but you never know for them to lose their life they can save another.  What this double blind trial is is that the patient nor the person who is giving the trial knows who each other is!!!