Making Solutions from Solids

1) I put 10g of NaCl into a 250ml beaker. I then distributed H2O in intervals of 20ml and watched as the molarity decreased. once i got close to my target morality of 1.0M i decreased the interval amount to 5ml. I had 165g of H2O in the beaker when the molarity of my solution became 1.0M. I them poured 100ml of my solution into a volumetric flask, thus completing the problem.

2)I poured 10g of MgCl2 into a 250ml beaker. I then added 200ml of water into the solution. I added more water in intervals of 10ml gradually until I reached the desired molarity. The molarity was then 7.009e-1 so I transferred 100ml into a volumetric flask in order to fulfill the objective.

3) First I Put 20g of Na2So410H2O into a 600ml beaker. I poured about 350ml of H20 into the solution until the molarity reached 0.34M. I poured 250ml of solution into a 250ml volumetric flask, solving the problem.

4) I put 20g of Na2So410H2O into a 600ml graduated cylinder. I knew i had to have over 500ml of solution so i added 500ml of water. I then added more of the solute until the molarity measured to 0.25M. Once My solution was complete i poured 500ml of it into a 500ml beaker in order to have my finished product.

The 'Solution' to pollution is Still 'Dilution'

This article was written to inform readers of how big companies continue to pollute our local rivers, lakes and streams despite the Clean Water Act that was passed thirty years ago. They use a loophole called "mixing zones" to dilute the water so the pollution is less concentrated. Small organizations are fighting to get rid of the mixing zones. The mixing zones process "bioaccumulative chemicals of concern." The EPA promised to discontinue the mixing zone process within ten years.

The article was written ten years ago so by now mixing zones should be out of existence. The Campaign to Safeguard Americas Waters(C-SAW) is a project devoted to cleaning up americas waters and to this day they continue to fight the good fight.

Dilution Problem #2

When I first read the description for this problem I was pretty much stumped. I thought about how I solved the first dilution problem. I first got a 600ml beaker and filled it with 25ml of HCl. I placed the Distilled water jug over the beater and titrated the water slowly and watched the molarity meter as the numbers decreased. I then retrieved a buret and a volumetric cylinder from the stockroom. I filled the buret with half HCl and half water. I filled the volumetric flask with 250ml of water and then titrated in some HCl. The solution was at then a 500ml volumetric flask of 3M HCl.

Dilution Problem #1

In order to achieve the solution i had to try several times to finally get it right. First i tried filling the remainder of the glucose beaker with water but it did not dilute it enough. I figured out that i had to get a large sized beaker from the stockroom and equip it with a pipette. i used the pipette to suck out a few drops of glucose, (~ 10ml) and put it in the beaker. i the placed the water tank over the beaker and set my distribution amount to 20ml and titrated it in at a steady rate until the molarity went down to 0.025.

New Periodic Table

Date: 7/6/10

To: Robert Kuhl

From: Jon Silva

Subject: Periodic Table

I think that we should switch to the new periodic table of elements. The new periodic table is much more understandable and easy to use and the function is greatly improved seeing as it is in a new arrangement as a spiral instead of a chart. In the new chart there is room for new undiscovered elements so as science progresses we can stay updated. The current periodic table is pretty lame because it is difficult to track down each element. The new table should be a great asset to chemists around the globe.

Periodic Table Activity

Yesterday my group and I were given an assortment of element cards the were cut out of a periodic table. The task was to arrange them in way makes it easier for us to understand. My first idea was to arrange them alphabetically by symbol. starting with Al, Brandon and I sorted and placed the cards in a straight line in alphabetical order. Kristine foiled our plan and made us arrange it in a way similar to the periodic table so we began sorting them by atomic number. At first the noble gas cards were missing, but were later handed out to us and with no reference chart we had to go by memory to figure out the correct order. I recognized where a few of the pieces went and arranged them correctly. The noble gases were easy to place because they have their own designated column. The periodic table is arranged by atomic mass from lowest to highest but it is also organized by column by valence electron count. In the end, our periodic table was set up just like the real one. In my opinion the periodic table should be set up alphabetically so it could be much easier to track down and find a specific element by name or symbol.