Chem Acids and Bases
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Acids taste:
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Sour
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Bases taste:
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Bitter
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Acids feel:
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Burning
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Bases feel:
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Slippery
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Acids react with metals?
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Yes
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Bases react with metals?
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No
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Do acids conduct electricity?
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Yes
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Do bases conduct electricity?
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Yes
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Bases turn:
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Red litmus paper blue
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Acids turn:
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Blue litmus paper red
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Acid indicator:
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Universal indicator
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Base indicator:
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Cabbage juice
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Bronsted Lowry Acid:
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Anything that releases H1+ ions
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Bronsted Lowry Base:
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Anything that accepts H1+ ions
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What is a hydronium ion?
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the ion H3O+
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What is a hydroxide ion?
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OH-.
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Strong Acid
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Completely ionized in solution
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Weak acid
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Partially ionized in solution
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Conjugate acid/base pair
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An acid and a base that easily transfer a hydrogen ion between each other
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Arrhenius acid
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A compound that releases H+ ions in solution
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Arrhenius base
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A compound that releases OH- ions in solution
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Conjugate acid of HCO3 in water
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H2CO3
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Household substance that's an acid
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Lemon juice
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Define amphoteric
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Can act as an acid and a base
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A salt is
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An ionic compound that does not contain H+, OH- or O-2
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What results from a neutralization
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H2O and a salt
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Classify HNO3 in this reaction HNO3+H2O=H3O + NO3
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Strong acid
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Classify NH3 in this reaction NH3 + H2O=NH4 + OH-
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Weak base
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Which pH range is basic?
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7-14
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Which pH is considered neutral?
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7
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A Titration is
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A carefully measured neutralization to determine the concentration of an acid or a base.
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An Endpoint is
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When a neutralization reaction is complete and moles of acid=moles of base
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Pink phenolphthalein has a pH of
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10
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Bases turn cabbage juice what color?
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Green
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Neutral substances turns universal indicator what color?
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Green
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Blue litmus paper turns what color in an acid?
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Red/pink
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Phenolphthalein turns what color in bases?
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Red/pink
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Red litmus paper turns what color in acids?
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Red/pink
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Blue neutral paper turns what color in neutral substances
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Blue
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Phenolphthalein turns what color in neutral substances
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Clear colorless
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Universal indicator turns what color in acids
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Red/pink
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Bases turn what color in cabbage juice
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Green
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Neutral substances turn what color in cabbage juice
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Purple
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Phenolphthalein turns what color in acids
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Clear colorless
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Blue litmus paper turns what color in bases
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Blue
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20.0 mL of HCl of an unknown concentration is titrated with 35.1 mL of .10 M KOH. The concentration of the HCl is
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.18M
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10.0mL of 0.20M H2SO4 is required to neutralize 133 mL of a NaOH solution of unknown concentration. What is the molarity of the NaOH solution?
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.030M NaOH
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What would the conjugate base be in the completed reaction: H2SO4 + H2O=?
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HSO4
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Acids react with what to produce what?
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Bases to produce water and a salt
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A substance that completely ionizes in aqueous solutions and produces H3O+ ions is:
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Strong acid
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Substances that change color in the presence of acids or bases are called:
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Indicators
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In the reaction HClO3 + NI=NH4 +ClO3 the conjugate base of HClO3 is:
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ClO3
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In a conjugate acid base pair acid typically has:
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One more proton than the base
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Bases taste
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Bitter
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In the reaction NH3 + H2O=NH4 + OH, H2O is acting as a:
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Brønsted-Lowry acid
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Two scientists were working with an unknown solution in a lab. They found it conducted electricity and and reacted when in contact with a metal.was this unknown substance an acid or a base?
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Acid
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Arrhenius defined an acid as a substance that
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Dissociates to produce hydrogen ions
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Acids make what color litmus paper turn what color?
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It makes blue paper turn red
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Acids make red litmus paper turn
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Red
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Neutral substances make red litmus paper turn
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Red
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Bases make red litmus paper turn
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Blue
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Acids make blue litmus paper turn
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Red
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Neutral substances make blue litmus paper turn
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Blue
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Bases turn blue litmus paper
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Blue
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Phenolphthalein turns acids what color
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Clear
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Phenolphthalein turns neutral substances what color
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Clear
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Phenolphthalein turns bases what color
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Pink
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Cabbage juice turns acids what color
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Red/pink
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Cabbage juice turns Neutral substances what color
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Blue/purple
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Cabbage juice turns bases what color
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Blue/green
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Universal indicator turns acids what color
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Red
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Universal indicator turns neutral substances what color
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Green
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Universal indicator turns bases what color
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Purple
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What is the titration equation for calculating an unknown concentration?
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(nH+)(Ma)(Va)=(nOH)(Mb)(Vb)
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How many milliliters of .550M Mg(OH)2 are required to neutralize 21.5mL of a .400M HBr solution?
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x=7.82mL
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How many moles of base are required to neutralize 65.5mL of 1.1M HCl solution?
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.072 moles
