PROCEDURE+-+DRAFT

=PROCEDURE - DRAFT= Ideas for the draft can be found here.


 * 1) Place the following chemicals into a beaker along with a thermometer : Sodium Thiosulphate Pentahydrate and Sodium Sulfate decahydrate
 * 2) Weigh the beaker on a scale and record all information
 * 3) On low heat, heat the beaker on a hot plate
 * 4) At increments of 5 degrees celcius, carefully remove beaker and weigh it on a scale
 * 5) Record all data
 * 6) Replace beaker onto hot plate and continue heating and weighing the beaker until all the water is evaporated to form another solid (transition temperature)
 * Sodium Acetate Dehydrate (Sodium Acetate Anhydrous) can be determined following the procedure above while using Sodium Acetate Trihydrate which (when dehyrated) forms Sodium Acetate dehydrate.

-Kristie

Kristie: Sweet, you have the same idea I had. So, we're looking at when like the water is evaporated to form a new substance. I was talking to Ralph (remember him?) and he said back in the days he heated copper (II) sulphate pentahydrate and it would change colour from blue to red. He told me thats probably what we're looking for. I think I'm going to elaborate on your procedure by adding to it and stuff. However, the only quesiton I have is how we're going to notice these increments of 5 degrees celsius. Plus I think I'm going to add quantities to the procedure. Hope this doesn't screw it up.... Oh yah...I was think...how about a testtube and bunsen burner? -Lowell

Hey! I've made some improvements and alterations of the procedure. Here it is: 1) Set up a retort stand and clamp a ring clamp 30 cm above the base. 2) Place a piece of wire gauze on the ring clamp so that the wire gauze fully covers the clamp. 3) Place a Bunsen burner beneath the clamp. 4) Place 50 mL of Sodium Thiosulphate Pentahydrate into a 250 mL beaker. 5) Place a thermometer into the compound in the beaker. Record the temperature and list the compound’s physical properties of weight, colour and other noticeable observations at the certain temperature. Mass will be measured with use of a electronic scale. 6) Remove the thermometer. 7) Ignite the Bunsen burner with a flint lighter and adjust to a moderate flame. 8) Using beaker tongs, place the beaker with the Sodium Thiosulphate Pentahydrate on the wire gauze. 9) Place the thermometer into the compound. At increments of 5 degrees Celsius, carefully remove beaker with beaker tongs. 10) Record the temperature, mass, colour and other noticeable changes quickly. 11) Using beaker tongs, place the beaker on the wire gauze again. 12) Repeat steps 9-11 until the mass of the beaker stabilizes or stays the same. 13) When the mass of the beaker stabilizes, turn off the Bunsen burner. When the mass has stabilized, it indicates that all the water has been evaporated from the hydrate to form another solid. The temperature at which the mass stabilizes is called the transition temperature. 14) Empty the contents of the beaker safely and wash the beaker. 15) Repeat steps 4-14 twice. However, instead of using Sodium Thiosulphate Pentahydrate, use Sodium Sulphate Deca Hydrate and Sodium Acetate Trihydrate the second time. Please edit (KAM!) and help me reword some of the instructions...its a tad wordy (esp step 15)

LOWELL

1) Set up a retort stand and clamp a ring clamp 30 cm above the base. 2) Place a piece of wire gauze on the ring clamp so that the wire gauze fully covers the clamp. 3) Place a Bunsen burner beneath the clamp. 4) Place 50 mL of Sodium Thiosulphate Pentahydrate into a 250 mL beaker. 5) Place a thermometer into the compound in the beaker. Record the temperature and remove thermometer 6) Weigh the beaker and list the compound’s physical properties of weight, colour and other noticeable observations at the certain temperature. Mass will be measured with use of a electronic scale. 6) Ignite the Bunsen burner with a flint lighter and adjust to a moderate flame. 8) Using beaker tongs, place the beaker with the Sodium Thiosulphate Pentahydrate on the wire gauze. 9) Place the thermometer into the compound. At increments of 5 degrees Celsius, carefully remove beaker with beaker tongs. 10) Record the temperature and remove thermometer. 11) Weigh beaker and record mass, colour and other noticeable changes quickly. 11) Using beaker tongs, place the beaker on the wire gauze again. 12) Repeat steps 9-11 until the mass of the beaker stabilizes or stays the same. 13) When the mass of the beaker stabilizes, turn off the Bunsen burner. 14) Empty the contents of the beaker safely and wash the beaker. 15) Repeat steps 4-14 but instead of using 50 mL of Sodium Thiosulphate Pentahydrate, use 50 mL of Sodium Sulphate Deca Hydrate and then repeat with 50 mL of Sodium Acetate Trihydrate.

Lowell I edited it and the bottom part, I deleted the part of the transition temperature and evaporation because we can put that part into our conclusion, because thats not really part of the procedure. Great work though!

-Kristie (ps. i some minor grammar mistakes :D. changed it -lowell)


 * If it is necessary to use Sodium Acetate Dehydrate follow this experiment

Procedure

 * 1) Place 250 mL of water into a beaker and place onto a hot plate
 * 2) Place 50 mL of crushed Sodium Acetate Dehydrate into a petri dish next to the hot plate
 * 3) Measure the mass of the petri dish filled with Sodium Acetate Dehydrate
 * 4) Place a thermometer next to the petri dish
 * 5) Turn on hot plate and heat until water boils
 * 6) Cover all items with a glass cover until the Sodium Acetate Dehydrate absorbs the water vapour and all the water evaporates
 * 7) Record all noticeable changes
 * 8) Remove glass cover
 * 9) Weigh the mass of the petri dish
 * 10) Empty contents of petri dish safely and wash all utensils

-Kristie

Back