Law of Conservation of mass- Atoms cannot be created or destroyed.
Chemical Equation- A representation of a chemical reaction that uses subscripts and coefficients to show the relationship between the reactants and the products.
Subscript- The number in front of a chemical symbol or formula.
Coefficient- A number written below and to the right of a chemical symbol in a formula.
Example: NaCl+F2 ------> NaF+Cl2
Na= 1 Na=1
Cl=1 Cl=2
F=2 F=1
Balance the equation using coefficients NOT subscripts. Then multiply the coefficient by the subscripts.
2NaCl+F2 -------> 2NaF+Cl2
Na=2 Na=2
Cl=2 Cl=2
F=2 F=2
Thursday, February 13, 2014
Friday, February 7, 2014
Solid Precipitate Experiment
- First we added 6 drops of ammonia (NH3) into a 10ml solution of water (H20) and copper sulfate (H10CuO9S).
- A white precipitate will form.
- As you add more ammonia ( in 6 drop increments) more precipitate will form.
- As more precipitate formed and fell to the bottom of the tube; the precipitate seemed to be yellow-green in color.
- Color change
- Energy being given off
- Formation of a precipitate
Experiment reflection
-10ml of cupric sulfate (H10Cu9S)
-(60 grams H10CuO9S+60ml of H2O)
-the chemical formaula formmonia molecule in NH3
-when you get to 36 drops +lml of ammonia
-when they put the first 6 drops white bubles started to form and go to the top.
-whe they put the next 6 drops there were more white bubbles.
-the next 6 drops made the top part of the tube light blue and the top was becoming a solid.
-in the next drops the top part became more of a solid and it was harder to shake.
-in the six drops their were a lot of white bubbles.
-in the final six drops you can see that the middle of the light blue is a solid.It is approximatly 1ml of ammonia. The top part was kind of warm. It was glowing in the dark alittle.
-When we put more drops the middle is completly solid and in the top still alittle bit of blue water.When we looked through the bottom it had kinda looked yellowish color.
-(60 grams H10CuO9S+60ml of H2O)
-the chemical formaula formmonia molecule in NH3
-when you get to 36 drops +lml of ammonia
-when they put the first 6 drops white bubles started to form and go to the top.
-whe they put the next 6 drops there were more white bubbles.
-the next 6 drops made the top part of the tube light blue and the top was becoming a solid.
-in the next drops the top part became more of a solid and it was harder to shake.
-in the six drops their were a lot of white bubbles.
-in the final six drops you can see that the middle of the light blue is a solid.It is approximatly 1ml of ammonia. The top part was kind of warm. It was glowing in the dark alittle.
-When we put more drops the middle is completly solid and in the top still alittle bit of blue water.When we looked through the bottom it had kinda looked yellowish color.
Expirament #2
EXPERIMENT #2 (CH3COOH + NaHCO3--CH3COONa + H2O + CO2)
By adding the 20ml of vinegar in the measuring test tube of 100ml it would stay in its form until the other chemicals are added. Our next step is putting a light tea candle and place a plastic container bowl then we would have an candle above the vinegar. Then adding baking soda approximately 1 gram to the tube so that the gas flows into the bowl.
By adding the 20ml of vinegar in the measuring test tube of 100ml it would stay in its form until the other chemicals are added. Our next step is putting a light tea candle and place a plastic container bowl then we would have an candle above the vinegar. Then adding baking soda approximately 1 gram to the tube so that the gas flows into the bowl.
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