wednesday, march 19, 2014
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Wednesday, March 19, 2014. EW: What are 3 indications that a chemical reaction has taken place? Today: Chemical Reactions Notes Alkaline Earth Metals Lab. Describing Chemical Reactions. 13.1 Chemical formulas. - PowerPoint PPT PresentationTRANSCRIPT
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Wednesday, March 19, 2014
EW: What are 3 indications that a chemical reaction has taken place?
Today: Chemical Reactions Notes Alkaline Earth Metals Lab
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Describing
Chemical
Reactions
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13.1 Chemical formulas A molecule’s chemical formula tells you the
ratio of atoms of each element in the compound.
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A chemical reaction is the process of breaking of chemical bonds (ionic or covalent) in one or more substances, and the reforming of new bonds to create new substances
indicators of chemical change are:1. formation of new gas2. formation of new precipitate (solid)3. release of energy (heat or light)4. color change
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Alkaline Earth Metals Lab
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Thursday, March 20, 2014
LT: I can demonstrate how chemical reactions rearrange atoms in molecules.
EW: How many elements in CO2? How many atoms?
Today: Alkaline Earth Metals Conclusion Carbon Compound Notes
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Thursday, March 20, 2014
LT: I can demonstrate how chemical reactions rearrange atoms in molecules.
Cool Friday Thing Today:
Turn in Alkaline Earth Metals Conclusion Turn in Covalent Bonding Worksheet Carbon Compound Notes
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Friday, March 21, 2014 LT: I can demonstrate how chemical reactions
rearrange atoms in molecules. Cool Friday Thing! What animal would you like
to be friends with? Today:
Ch. 13 Quiz Finish Carbon Compound Notes
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13.3 The chemistry of carbon Because carbon has 4 valence electrons it can form
4 covalent bonds allowing it to make large molecules.
Carbon molecules come in three basic forms: straight chains, branching chains, and rings.
All three forms are found in important biological molecules.
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13.3 Organic compounds Scientists classify the organic molecules in living
things into four basic groups: carbohydrates, proteins, fats, and nucleic acids.
All groups, except fats, form molecules called polymers (large molecules
composed of repeating units, called monomers, like beads in a necklace)
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13.3 Carbohydrates Carbohydrates
energy-rich compounds made of carbon,
hydrogen, and oxygen classified as sugars or
starches Glucose is a single sugar
(monomer) Starch is a long chain of
sugars (polymer) Cellulose is in plant
material (wood) (polymer)
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Monday, March 24, 2014 LT: I can demonstrate how chemical reactions
rearrange atoms in molecules.
EW: Name one carbohydrate you have eaten today.
Today: Finish Carbon Compound Notes Go over Covalent Bonding Wksht
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13.3 Lipids
Lipids Like carbohydrates,
energy-rich compounds made from carbon,
hydrogen, and oxygen include fats, oils, and
waxes.
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13.3 Proteins Proteins
basic molecular building blocks of cells and all parts of animals
among the largest organic molecules (polymers) Ex. Enzymes, hemoglobin, keratin (hair, skin, nails)
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13.3 Nucleic Acids Instructions for cellular
reactions Ex. DNA & RNA (polymers)
5-carbon sugars Nitrogen containing base phosphate groups
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Tuesday, March 25, 2014 LT: I can demonstrate how chemical reactions
rearrange atoms in molecules.
EW: Name the 4 types of organic carbon compounds and give an example of each one.
Today: Chemical Reaction Notes & Reading
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Chemical Reactions energy is stored in ionic and covalent bonds
exothermic reaction– energy is released (burning)
endothermic reaction– energy is absorbed (cold packs)
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Conservation of mass matter cannot be created nor destroyed in
chemical reactions
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chemical equations convey as much info. as possible about what happens in a chemical reaction during a chemical change
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some important chemical reactions burning of fossil fuels
photosynthesis
rusting of metals
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Balancing Chemical Equations each side of the equation must have the same
number of atoms of each elements bicycle example
skeletal equation frame + wheel + handlebar + pedal → bike
balanced equation frame + 2 wheels + handlebar + 2 pedals → bicycle
tricycle example skeletal equation
frame + wheel + handlebar + pedal → bike balanced equation
frame + 3 wheels + handlebar + 2 pedals → tricycle
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NOT BALANCED!
BALANCED!
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Wednesday, March 26, 2014
LT: I can demonstrate how chemical reactions rearrange atoms in molecules.
EW: 1. A __________ tells me how many atoms of
each element are in a compound. 2. A __________ tells me how many
molecules of each compound are needed to balance the chemical reaction equation.
Today: Chemical Reaction Reading & Simulation
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this is NOT balanced
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How about these? ?KCl + ? H2SO4 ? HCl + ? K2SO4
2KCl + H2SO4 2HCl + K2SO4
NaCl (aq) + AgNO3 (aq) AgCl (s) + NaNO3 (aq) balanced
Al(s) + O2(g) Al2O3(s) 4Al(s) + 3O2(g) 2Al2O3(s)
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Rearranging Atoms in Chemical Reactions
Read the text. When finished come get a packet of materials for you and a partner.
Look at the card with the 3 chemical reactions. For the 1st chemical reaction, use the “atom” cards and arrange
the reactants on the left. CHEMICAL REACTION! Place the arrow in the middle after the
reactants. Rearrange the “atom” cards to make the products. Repeat for the other 2 chemical reactions. Was law of conservation of mass maintained? How do you know? Answer the question above and all 4 questions on the last page of
the reading on your own paper.
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Thursday, March 27, 2014
LT: EW: Today:
Rate of Chemical Reactions Lab
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Wednesday, March 26, 2014
LT: Today:
Rate of Reaction Conclusion Concluding Statement – did the levels of the
independent variable create a trend in the data? Support your conclusion with data – cite low and high
values, talk about trend or no trend What does data tell you? Therefore statement – I learned Potential errors in lab, how you could improve lab, etc.
Ch. 14 V & C Work time