Friday, November 5

Mr. Henderson started out the period by looking at the scribe from the previous day by Katie then began to work on problems #33, 34, and 35 on page #10.

*when working on these problems and those similar to them...
1) write the reactants
2) write the products
3) balance the equation

PAGE #10

33.Butane gas (C4H10) is burned in a gas lighter.

C4H10 + 13/2O2 ---> 4CO2 + 5H2O ... need to have coefficients that are whole numbers so multiply all coefficients by 2

C4H10 + 13O2 ---> 8CO2 + 10H2O

34.Zinc reacts with silver(I) nitrate in a single replacement reaction

Zn + 2AgNO3 ---> 2Ag + Zn(NO3)2

35.Fluorine reacts with sodium bromide in a single replacement reaction.

* UNCLE HONClBrIF*
F2 + 2NaBr ---> 2NaF + Br2

NOTE:
~Whenever something is burned, combustion occurs and the result is the oxide of the element.
~Hydrocarbons are most commonly burned.
>octane(car or bus ride to school)
>methane CH4(to heat home or cook food)
>propane C3H8(grill)
-result in carbon dioxide CO2 and H20(water)
~CO2 causes environmental problems
(greenhouse gas -> greenhouse affect -> global warming)
-sunlight can get through and heat the earth but cannot escape well

DEMO:
SOLUBLE SOLID-
Potassium iodide in beaker(white solid)
solution=solute (present in least amount)
water=solvent(present in greatest amount)
-end result is the solid is gone(dissolved in water)
KI(s) ---> KI(aq)

TO BE ABLE TO TELL IF A SOLUTE DISSOLVES...
1. boil water(about 30 minutes)
~result would be KI in solid state (white)
2. taste it(shouldn't just taste like water)

Copper Chloride
-dissolves in water(changes color to a greenish blue)

Lead Nitrate(heavy)
-dissolves in water(whitish liquid)
Pb(NO3)2(s) ---> Pb(NO3)2(aq)

ALL LIQUIDS MAKE THE LIGHT BULB LIGHT UP BECAUSE THE SOLIDS BROKE DOWN INTO CHARGED IONS.

SUGAR DOES NOT LIGHT THE LIGHT BULB BECAUSE NO IONS ARE PRESENT.

HW:
*TEST MOVED TO NEXT FRIDAY
*webassign due Monday
*delicious assignment probably due Wednesday(tags- hcp3y1011 unit4 first name, last initial. do not use commas to separate the tags just separate by spaces and keep the tags in this order.
*lab notebooks will be collected Friday