Elements and Compounds
Observations
Elements are pure substances with the same atoms. Compounds can change and be split while elements can't. Compounds are form of two or more elements.
Questions
Are the reactions difference from one another? Will the product have any differences from the initial substances?
Gather Data
-PbNO3 > lead nitrite
-Zn > Zinc
-HCI > hydrochloric acid
-H2O > water
-Na > sodium
-NH4 > ammonium
-NO3 > nitrite ion
Hypothesis
Every reaction will be different from one another. We think this because each combination of elements are composed of different atom structure. So, depending on those elements their mixture will result in a new form from the initial one.
Experiment
We are going to evaluate a mixture formed by elements watching the biochemical reactions they go through, expecting a new substance to form.
Data from Experiment
PbNO3 + Zn > We notice that the zinc, which is a metal, changed of color, from gray to black.
HCI + Zn > Now, the zinc, was in little rocks, the hydrochloric acid took out the oxygen from the metal. We noticed this by the gass/bubbles.
H2O + Na > Sodium reacts so easily, so by combining the sodium with water, gas was produced.
(NH4)NO3 + H2O > At first, it look like nothing changed but as we looked closely, it appeared like vinagger. Another thing that happened, is that water got colder.
Flame Test Precipitate
OBSERVATIONS
Flame Test
We will mix two substances and see what the color of the flame becomes.
Purple is the highest intensity a flame might have and red is the least intensity that a flame might have.
Precipitate
We will mix two substances and find out if they will be able to mix or if they won´t.
If they don't we will also learn the reason why they didn't mix.
QUESTIONS
Flame Test
Will there be a dramatic change in color?
Precipitate
Will the product have a dramatic change?
DATA
Flame Test
- Bunsen burner
- Test tubes
- Test tubes rack
- Bacteriological loop
- Calcium Chloride CaCl2
- Sodium Chloride NaCl
- Copper Chloride CuCl2
- Potassium Chloride KCl
- Unknown solution
Precipitate
-Lead Nitrate Pb(NO3)2
-Potasium Iodide KI
-Calcium Hidroxide Ca(OH)2
-Copper Sulfate CuSO4
-Iron Chloride FeCl3
-Silver Nitrate Ag(NO3)
-Test tubes
-rack
– Pb(NO3)2 + KI
(GREEN) (VIOLET)
– Ca(OH)2 + CuSO4
(ORANGE) (BLUE)
– CuSO4 + Pb(NO3)2
(BLUE) (GREEN)
– AgNO3 +KI
(SILVER) (VIOLET)
– FeCl3 + Pb(NO3)2
(GOLD) (GREEN)
HYPOTESIS FOR
Flame Test
Every reaction for every product will be different color.
Precipitate
Mixing the two substances will make a solid reaction turning it into a different color than what the substances' colors started.
EXPERIMENT
Flame Test
Students use flame tests to determine the identity of the carbon (positive charged ion) in an unknown solution.
Precipitate
Observe compound precipitation by the chemical combination of reactants.
Properties of Ionic and Covalent Compounds
BOILING POINTS
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CONDUCTIVITY
The objective of this was to
Identify the types of chemical reactions and develop their corresponding chemical equations. The procedure was to
Mix reactive 1 with reactive 2
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We had to create a shampoo for these term 3. We had to mix different compounds to create this shampoo.