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32 Cards in this Set
- Front
- Back
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3 factors that determine the rate of a reaction
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1. the presence of a catalyst
2. temperature increase/decrease 3. concentration of reactants |
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3 things to shift equilibrium
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1. change concentrations of product or reactant
2. change temperature 3. change pressure |
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Why must equations balance?
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to satisfy law of mass and energy
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What is stoichiometry?
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the relationship between mass and moles
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What is the common lab acid that does not make H2 gas when Mg is added?
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nitric acid
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Differentiate between exo and endo thermic
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exo gives off heat
endo absorbs heat |
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coefficients
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indicate how much of a substance is present, helpful when figuring out ratios of substances in an equation
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subscripts
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indicate the number of atoms present in a substance
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reactants
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are on left of an equation; react to form products
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neutralization
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when the acid and base concentration are equal
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end point of reaction
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when H's equal OH's
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amphoteric
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behaves as an acid or base such as water or baking soda
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5 strong acids
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HCl, HBr, HI, HNO3, HClO4
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5 strong bases
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NaOH, KOH, CSOH, Ca(OH)2, Ba(OH)2
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Why is rainfall acidic?
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because of the CO2 in the atmosphere and other pollutants in the air such as sulfur
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List any two buffer systems that help maintain proper PH of blood.
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carbonic, phosphoric
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acid + base =
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salt + water
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Na + HOH =
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H2 + 2NaOH
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List the name of any indicator you have used
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phenolphalein
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You drop unheated marble chip into water and phenolphalein and nothing happens. You drop heated marble chip (CaCO3) into water with phenolphalein and it turns water pink. Why?
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the heated chip gives off CO2 gas and leaves a CaO substance in the water which is a base. the presence of the base in the phenolphalein turns it pink.
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What types of compounds make good electrolytes?
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strong acids or bases
soluble salts |
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T or F An example of a buffer system is sulfuric acid and sodium sulfate.
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False
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List any 3 rules for balancing equations
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-know correct formula
-radicals stay together -find charge/ criss cross to get coefficient |
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metal oxide + HOH makes
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base
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non metal oxide + HOH makes
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acid
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carbonates or bicarbonates give off ____ gas
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CO2
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T or F Any good antacid removes all the acid from the stomach
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False
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What is Avogadro's number? Why is it important?
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6.023x10^23 it is used to convert moles to molecules
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Why is baking soda used for first aid spills on your skin, regardless of whether you spilled acid or base?
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it is amphoteric so it will counter the effects of whatever spilled on the skin
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Why is it important not to change subscripts when balancing equations?
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theres only 1 right formula to complete the equation
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T or F enzymes are catalysts
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True
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What is the Haber Process?
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N + HOH ---> NH3
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