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Label 100 mL beaker
"MIX"
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Label 50 mL beaker
"A"
for Acids
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Label another 50 mL beaker
"B"
for Base
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Using 25 mL graduated cylinder
Measure 20 mL
HCI
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Pour it into the
"MIX"
beaker
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Rinse Cylinder with
tap water
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Rinse cylinder with 10 mL
of distilled water
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In the 10 mL graduated cylinder
Measure an additional 5 mL
HCI
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Pour it in the
"A" beaker
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Rinse Cylinder with
tap water
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Rinse cylinder with 10 mL
of distilled water
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Add 3 drops of phenolphthalein indicator to the acid in the
MIX beaker
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In the 25 mL graduated cylinder
Measure 20 mL
NaOH
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Add it slowly to the MIX beaker
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Use stirring rod to mix the two solutions
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In the 10 mL graduated cylinder
Measure and additional 5 mL
NaOH
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Pour it in the
"B" beaker
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Rinse Cylinder with
tap water
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Rinse cylinder with 10 mL
of distilled water
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Is the liquid in the MIX beaker
PINK?
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NO
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Use eyedropper to add sodium hydroxide from the "B" beaker 1 drop at a time to the acid in the MIX beaker.
Stir after each drop
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Continue adding drops until the color changes to pink and remains pink.
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YES
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Use the second eyedropper to add hydrochloric acid from the "A" beaker one drop at a time to the MIX beaker until the pink just disappears after stirring.
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Use first eyedropper to add sodium hydroxide from the "B" beaker 1 drop at a time to the acid in the MIX beaker.
Stir after each drop
until pink reappears
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Repeat #8 and #9
to convince yourself that a tiny excess of acid or base will change the color
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Rinse one eye dropper with tap water. Obtain a microscope slide.
place 1 drop neutralized salt solution on slide.
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Blow on slide until a white crust forms around the outside of puddle. Examine under the low power objective of a microscope. Look for small cubical crystals. NaCl (table salt)
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Making Halite: A Neutralization Reaction
