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Published byLee Barrett Modified over 9 years ago
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COMMON SENSE IS LIKE DEODORANT, THE PEOPLE WHO NEED IT THE MOST NEVER USE IT.
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WHAT IS AN ACID?
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A SUBSTANCE THAT PRODUCES HYDROGEN IONS WHEN DISSOLVED IN WATER.
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WHAT IS A BASE?
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A SUBSTANCE THAT PRODUCES HYDROXIDE IONS WHEN DISSOLVED IN WATER.
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GIVE AN EXAMPLE OF AN ACID.
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HYDROCHLORIC ACID, HCl
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GIVE AN EXAMPLE OF A BASE.
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SODIUM HYDROXIDE
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WHAT MAKES AN ACID OR A BASE A STRONG ACID OR BASE?
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THEY DISSOCIATE COMPLETELY IN SOLUTION. A STRONG ACID DISSOCIATES INTO HYDROGEN ION AND THE ANION OF THE ACID. HCl H + + Cl - A STRONG BASE DISSOCIATES INTO HYDROXIDE ION AND THE CATION OF THE BASE. NaOH Na + + OH -
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WHAT MAKES AN ACID A WEAK ACID OR A BASE A WEAK BASE?
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THEY ONLY PARTIALLY DISSOCIATE (BREAK APART) IN SOLUTION.
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GIVE AN EXAMPLE OF A WEAK ACID.
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ACETIC ACID (VINEGAR IS ~3% ACETIC ACID.)
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GIVE AN EXAMPLE OF A WEAK BASE.
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AMMONIA IS A WEAK BASE NH 3 + H 2 O NH 4 + + OH -
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WHAT SCALE IS USED TO MEASURE THE ACIDITY OR BASCITY OF SOLUTIONS?
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THE pH SCALE
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ON THE pH SCALE, WHAT IS THE pH OF A NEUTRAL SOLUTION?
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7
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ON THE pH SCALE, WHAT IS THE pH OF A BASIC SOLUTION?
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GREATER THAN 7
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ON THE pH SCALE, WHAT IS THE pH OF AN ACIDIC SOLUTION?
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LESS THAN 7
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GIVE 3 CHARACTERISTICS OF AN ACID.
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1)THEY HAVE A SOUR TASTE 2)THEY TURN BLUE LITMUS RED 3)THEY REACT WITH BASES TO PRODUCE WATER AND A SALT 4)THEY REACT WITH ACTIVE METALS TO PRODUCE HYDROGEN 5)THEY REACT WITH CARBONATES TO RELEASE CARBON DIOXIDE GAS
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GIVE 3 CHARACTERISTICS OF A BASE.
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1)THEY HAVE A BITTER TASTE 2)THEY FEEL SLIPPERY 3)THEY TURN RED LITMUS BLUE 4)THEY REACT WITH ACIDS TO PRODUCE A SALT AND WATER 5)THEY REACT WITH MOST METAL CATIONS TO FORM A PRECIPITATE
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WHAT CAUSES ACID RAIN?
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OXIDES OF SULFUR AND NITROGEN PRODUCED FROM COMBUSTION SOURCES (COAL FIRED POWER PLANTS AND CARS AND TRUCKS)
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WHY IS ACID RAIN IMPORTANT?
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THERE IS A NARROW RANGE THAT FISH AND OTHER ORGANISMS IN STREAM CAN TOLERATE.
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HOW COULD YOU DETERMINE THE pH OF A WATER SAMPLE?
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BY USING INDICATOR DYES OR pH ELECTRODES.
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