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62 Cards in this Set
- Front
- Back
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What kind of ions do acids pproduce?
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H+
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What is the pH value of a base?
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ph>7
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A base produces ____ ions
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OH-
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OH- is a _____ ion
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hydroxide
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H+ is a ____ ion
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hydrogen
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H30 is a ____ ion
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hydronium
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The front end of many acids contain what element?
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Hydrogen
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What is sour taste a charactaristic of?
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aicds
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What effect does an acid have on metal?
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it corrodes it
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What does corrodes mean?
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eats away
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Acids have a pH of what?
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pH<7
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What is a neutral pH?
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7
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The pH scale ranges from what?
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0-14
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An acid added to a base produces....?
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water and a salt
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Bases taste ____?
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bitter
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Bases feel _____?"
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Slippery
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What is a substance which changes color in the presence of an acid or a base?
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an indicator
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An alkaline substance has a pH of?
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pH>7
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What do buffers do?
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neutralize acids
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The term that refers to all of the chemical changes that occur in the body?
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metabolism
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When molecules break apart in water, they are said to have ______?
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dissociated
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Describe how you find the concentration of a base
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Poured 25 mLs of base into a clear plastic cup. Then we filled the beret to 50 mLs with 5% vinegar. We added two drops of phenolphthalein to the base (it turns pink). We slowly dripped the acid into the base until it turns from pink to clear. Determine the volume of the acid by subtracting 50 from the amount of vinegar currently in the beret. that is the volume of the acid (in the cup). Then you do Na*Ca=Vb*Ca
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What is the formula for finding the concentration or volume of an acid or base?
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Va*Ca=Vb*Cb
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What is NaOH? (acid or base?)
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base
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What is HCl? (acid or base)
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acid
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Why would something be an acid?
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It has more H+ ions than OH- ions
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What is H+ (H30)? (acid or base?)
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acid
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What is OH-? (acid or base?)
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base
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What is BTB?
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An indicator.
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What color did BTB turn to when it is an acid?
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yellow
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What color did BTB turn to when it was a base?
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blue
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What is NH3? (acid or base?)
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neutral
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What are three major acids?
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HCl (hydrochloric)
H2SO4 (sulfuric) Nitric (HNO3) |
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What are 3 properties of acids?
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-sour
-clear -corrodes metal |
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What do acids produce in water?
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H30 (H+)
aka hydronium ions |
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What is pH?
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The measure of acidity or alkalinity in a solution
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What do bases produce in water?
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hydroxide ions (OH-)
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What are three major bases?
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NaOH, NH4OH, Ca(OH)2
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what are four properties of bases?
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clear liquids
-bitter -slippery -emulsifies fat |
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How do you neutralize acids?
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you raise pH of acids by adding a base
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How do you neutralize bases?
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add an acid
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Why is the water molecule so important to organisms?
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cells are mad up mostly of water and its required for almost every metabolic reaction in the body
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What ions form when water dissociates.
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H+ and OH-
hydrogen and hydroxide |
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What is meant by the term alkalinity?
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basic
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What is produced by the body to help neutralize acidic conditions?
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buffers
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Acids have more _____ ions and taste _____ and can be _______
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H+m sour, sorrosive
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Bases contain more ____ ions then _____ ions.
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OH-, H+
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____ fluids are acid in the body and must be ____ by _____
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Digestive, neutralized, buffers
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Bases taste _P___ and feel ))))
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bitter, slippery
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What is neautralization?
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adding an acid to a base to make the pH be 7
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What 2 things are produced by neautralization?
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a salt and water
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Neutralization keeps our pH at ____ and is an example of maintaining _____
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7, homeostasis
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What is homeostasis?
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the process of our bodies maintaining neutral pH so that proteins can work properly without being unfolded
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What chemicals does the body produce to keep a neutral pH?
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buffers
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Acidic and basic conditions occur due to ____ reactions in the body
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metabolic (chemical)
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What is dissociation?
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When the force of an attraction is so great between molecules that the molecules are seperated from each other
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What is an ion?
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a charged atom or molecule
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What is the hydronium ion?
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an ion that forms when free H+ ions react with another water molecule
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How do you measure for acidity or alkalinity?
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measure the relative amount of H+ and OH- ions dissolved in a solution
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What is the name for Oh- ions?
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hydroxide ion
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What is the name for the H+ ion?
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hydrogen
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Why do proteins need a near neautral pH?
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for proteins, if it is ot neautral, proteins can change their shape and stop working
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