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Determine pH using pH meter
Aim:
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To neutralize two substances through the process of diluting an acid with a base
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Determine pH using pH meter:background
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Neutralization is a process that occurs when an acid and a
base are combined
Once they are mixed they create salt and water
An acid donates protons and has a ph less then 7. They are
sour and are corrosive to metal
A base is a proton acceptor and has a pH more then 7. They
are bitter and have a slippery texture.
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Determine pH using pH meter
Materials:
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PH meterhydrochloric acidsodium hydroxidepheophlalenone beakerone buretteone burette standdeionized water
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Determine pH using pH meterprocedure
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Take 10 ml hy. acid in beakerrinse burette with 3-4 mil of NaOh solutiondiscard naoh solution and fill burette with 20 ml of hydroxide solutionadd 3 drops phenolphalen
- add
1 ml of hydroxide solution to beaker. Record data
- do
this 5 times
- add
approx. .5 ml of hydroxide solution to beaker. Record data
- do
this 10 times
- add
approx 1 ml of hy. Solution to beaker
- do
this 5 times
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Determine pH using pH meterresults
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Acid base neutalizationphamount of NAOH
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Determine pH using pH meterconclusion
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Blue--> pink
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Base used in lab
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Sodium hydroxide
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Acid used in lab
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Hydrochloric acid
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Indicator:
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Phenphallen
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The more ___ there is, the less___ there is
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Ph ions, ph
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Acid rains ph is less then
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5.6
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Effects of acid rain
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Reduced crop productivityaccelerate leaching of nutrients & heavy metalsdissolves distribution pipeskills marine liferespiratory problems in organisms
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What is groundwater
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Water between soil and rock particles undergroundnon renewable
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Two types of aquifers
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Confineunconfined
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Contamination of groundwater
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Salt water intrusionshuman activity- dumping hazarous wasteco2 userunoffseptic tanks
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