p1g7+mp4



=__//**Chemical Reactions Lab- April 28, 2012**//__ =

Procedures:
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 * Paper weight: 0.9 grams
 * When measuring water, measure to 15 mL
 * Mixtures (NaCHO3 and CaCl2): 0.5 grams

Table:
Beginning Temp: 21.8 Celsius End Temp: 31.5 Celsius || Beginning Temp: 21.5 Celsius End Temp: 19.4 Celsius || Beginning Temp: 21.7 Celsius End Temp: 21 Celsius || Beginning Temp: 22.3 Celsius End Temp: 21.7 Celsius || Beginning Temp: 19.7 Celsius End Temp: 20 Celsius || Beginning Temp: 20.5 Celsius End Temp: 17.7 Celsius || Beginning Temp: 19.7 Celsius End Temp: 26 Celsius ||
 * **Combination ** || **Prediction ** || **Observation ** ||
 * **BB+ CaCl2 ** || Nothing || Exothermic dissolve, light blue, small fog on the bottom
 * **BB+ NaHCO3 ** || Precipitate || Bottom is a little foggy, color is still dark blue
 * **BB+ CaCl2+ NaHCO3 ** || Gas || Turned white with green-yellow gas bubbles, white and foggy, temperature rose then dropped, fizzled
 * **NaHCO3+ CaCl2 ** || Precipitate || Nothing happens except a small drop in temperature
 * **CaCl2+H2O+NaCHO3 ** || Gas Bubbles || Foggy, fizzy, gas bubbles produced
 * **NaCHO3+ H2O ** || Gas Bubbles or Precipitate || Foggy on the bottom, NaHCO3 dissolved a little, but most remained on the bottom
 * **CaCl2+ H2O ** || Precipitate || Water becomes foggy and CaCl2 dissolves

**Background Info For Chemical Reaction Lab:** <span style="color: #800080; font-family: 'Comic Sans MS',cursive; font-size: 120%;">Sodium Chloride: <span style="color: #800080; font-family: 'Comic Sans MS',cursive; font-size: 120%;">-Can cause irritation to the skin and eyes and internal irritation. <span style="color: #800080; font-family: 'Comic Sans MS',cursive; font-size: 120%;">-Not Flammable <span style="color: #800080; font-family: 'Comic Sans MS',cursive; font-size: 120%;">-It is commonly known as table salt

<span style="color: #800080; font-family: 'Comic Sans MS',cursive; font-size: 120%;">Water: <span style="color: #800080; font-family: 'Comic Sans MS',cursive; font-size: 120%;">-Is not an irritant to the skin <span style="color: #800080; font-family: 'Comic Sans MS',cursive; font-size: 120%;">-Used to mix with BB (Bromothymol blue) <span style="color: #800080; font-family: 'Comic Sans MS',cursive; font-size: 120%;">-is sterile and not deadly

<span style="color: #800080; font-family: 'Comic Sans MS',cursive; font-size: 120%;">Sodium Bicarbonate: <span style="color: #800080; font-family: 'Comic Sans MS',cursive; font-size: 120%;">-Can cause irritation to skin and eyes <span style="color: #800080; font-family: 'Comic Sans MS',cursive; font-size: 120%;">-NaHCo3 (symbol) <span style="color: #800080; font-family: 'Comic Sans MS',cursive; font-size: 120%;">-Is more commonly known as baking soda <span style="color: #800080; font-family: 'Comic Sans MS',cursive; font-size: 120%;">-Noncombustible

<span style="color: #800080; font-family: 'Comic Sans MS',cursive; font-size: 120%;">Bromothymol Blue: <span style="color: #800080; font-family: 'Comic Sans MS',cursive; font-size: 120%;">-BB (symbol) <span style="color: #800080; font-family: 'Comic Sans MS',cursive; font-size: 120%;">-Cause multiple irritations to skin and if ingested can be very harmful to the body <span style="color: #800080; font-family: 'Comic Sans MS',cursive; font-size: 120%;">- Turns yellow when faced with acid like materials <span style="color: #800080; font-family: 'Comic Sans MS',cursive; font-size: 120%;">- Is mixed with water before experiment

<span style="color: #800080; font-family: 'Comic Sans MS',cursive; font-size: 120%;">Summary:
<span style="color: #800080; font-family: 'Comic Sans MS',cursive; font-size: 120%;">When we mixed many of the elements, little to nothing happened. In a few mixtures there was fog at the bottom like BB+ NaHCO3 or a drop in temperature like NaHCO3+ CaCl2. Mixing others showed much better results of a reaction such as BB+ CaCl2+ NaHCO3 which turned a whitish, yellow-green, produced a gas, and temperature changed.

<span style="color: #800080; font-family: 'Comic Sans MS',cursive; font-size: 120%;">Conclusion: Sometimes little to no reactions occur when chemicals are mixed. When certain ones are mixed, however, they produce a much greater reaction. <span style="font-family: 'Comic Sans MS',cursive;">

<span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 110%;">Procedure:
<span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 110%;">Question: How does the mass of the reactants compare to the mass of the products in a chemical reaction when a precipitate is formed? <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 110%;">Hypothesis: We believe that the mass will stay the same. <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 110%; line-height: 0px; overflow-x: hidden; overflow-y: hidden;">

<span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">Results:
<span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">group || <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">Mass <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">of the glassware || <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">Mass <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">of the <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 120%;"> reactants <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">and the glassware || <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">mass <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">of the reactants <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">alone || <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">mass of the products <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">and the <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 120%;"> glassware || <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">mass of the <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">products alone || <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">change <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">in the mass || <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">Pictures:
 * <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">Lab
 * <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">1 || <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">94.2 || <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">99.2 || <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">5.0 || <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">99.1 || <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">4.9 || <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">-1.0 ||
 * <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">2 || <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">95.5 || <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">99.5 || <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">4.0 || <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">99.5 || <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">4.0 || <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">0 ||
 * <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">3 || <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">80.1 || <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">84.4 || <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">4.25 || <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">84.5 || <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">4.26 || <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">+0.1 ||
 * <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">4 || <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">82.2 || <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">86.4 || <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">4.2 || <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">86.4 || <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">4.2 || <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">0 ||
 * <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">5 || <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">74.4 || <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">79.0 || <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">4.6 || <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">79.0 || <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">4.6 || <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">0 ||
 * <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">6 || <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">92.9 || <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">96.9 || <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">4.0 || <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">96.7 || <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">3.8 || <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">-0.2 ||
 * <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">7 || <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">88.3 || <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">92.0 || <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">3.7 || <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">92.0 || <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">3.7 || <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">0 ||

<span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">Conclusion:
<span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">In the lab experiment, the question was "Would the mass of lead nitrate and sodium iodine change after the reaction?" We had found out that the independant variable (mass) had hardly been affected. This lead us to conclude that the chemical reaction doesn't change the mass. There was a change in product though.

<span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">Balancing the Equation:
<span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">Pb(Na3)2+NaI--> NaNo3+ PbI2