Grab binders, handouts & returned work & begin the Do Now
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Transcript of Grab binders, handouts & returned work & begin the Do Now
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Grab binders, handouts & returned work & begin the Do Now
4/30 Do Now1. Silently read the article titled “Biodegradable
Definition”, and answer the following 3 questions as you read…
- Define biodegradable in your own words- What are pitfalls of biodegradable products?- What are some examples of a biodegradable
products you use in your daily lives?
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Mandatory Office HoursP1
DavidNicholasMarcusMichaelRubenDajonAntwan
P3JustinWilliamDelanteBradleyMonicaMoniqueDevonte
G4DoenikaTayiaNeddjiRobertoDiamondPerlaDavidLa’NeshaArturoMiltonTerrae
G5AdalynnArkitaAngel FJoeyAlyssiaRavenLizabelCesar
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Reaction Equation Recap:
Phases
2H2O2(aq) 2H2O(l) + O2(g)
Reactants Products- 1 reactant, 2 products- Chemical rxn NOT physical rxn
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What types of chemical reactions are there?
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Decomposition • Description: a compound breaks down to
simpler products• General Equation:
AB A + B• Example:
2NaCl 2Na + Cl2
• Question: More products than reactants?
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Synthesis• Description: 2 or more simpler reactants
join to form a compound• General Equation:
A + B AB• Example:
2Na + Cl2 2NaCl
Question: More reactants than products?
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Single Exchange• Description: a single atom replaces
another atom in a compound • General Equation:
A + BC AC + B• Example:
2Na + CuCl 2NaCl + CuQuestion: Do we see a single element on both sides?
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Double Exchange• Description: atoms in compounds switch
partners and end with 2 new compounds• General Equation:
AB + CD AD + BC• Example:
NaCl + LiBr NaBr + LiClQuestion: 2 compounds of reactants and as products?
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Combustion• Description: a CH compound burns in O2
to form CO2 and H2O (water)
• Example:C2H4 + 3O2 2CO2 + 2H2O
Question: are CO2 and H2O products?
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Law of Conservation of MassKey Point 1:
- In a chemical reaction, the mass of the products equals the mass of the reactants
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Lab 2: Biodegradable SoapQuestion:
Are natural, homemade soaps better or worse for our skin compared to generically mass-produced
soaps?Directions: 20 min…
- determine the WHAT part of your purpose- Read the lab background and complete the hypothesis and Pre-lab questions
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Lab 2: Biodegradable SoapDirections: 40 min…
- Complete the Lab- Clean up your lab bench- Begin your written lab report & complete class work
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Counting Atoms in CompoundsStep 1:
Identify each element in the compoundStep 2:
Distribute your subscriptsStep 3:
Distribute your coefficients across all elements
a. 4PO4
b. 6C3H8O2
c. (CH4) 2N2
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Counting Atoms Guided Practice How many atoms of each element are in the
following molecules?
1. H2SO4
2. CaOH2
3. NaCl
4. (NH3)3PO4
5. 3H2O
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Answers 1. 2 hydrogen, 1 sulfur, 4 oxygen 2. 1 calcium, 1 oxygen, 2 hydrogen 3. 1 sodium, 1 chlorine 4. 3 nitrogen, 9 hydrogen, 1
phosphorus, 4 oxygen 5. 6 hydrogen, 3 oxygen
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Exit Ticket 3Directions:
You have 5 minutes to complete the Exit Ticket to the best of your ability. You MAY NOT use notes, but you may use a Periodic Table. When finished submit to the class bucket and put up your binder.