Double+Replacement+I


 * Station 1

Double replacement is when two elements switch places in a reaction.**

Two examples are two guys switching hats or dance partners switching their partners.

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· When silver nitrate combines with sodium chloride, two new compounds; silver chloride and sodium nitrate are formed because the sodium and silver switched places.
 * Station 2 **
 * AgNo3 + NaCl **** à **** AgCl + NaNo3 **

· The hydrogen ion from one reactant unites with the hydroxide ion from the other reactant to form water.
 * H (aq) + HCl (aq) ** à **NaCNaOl (aq) + H2O (l) **

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STATION 3 Station 4 media type="file" key="double 4.wmv"

**__ Station 6 __** Barium Hydroxide + Sodium Sulfate -> Sodium Hydroxide + Barium Sulfate BaOH + NaSO4 -> NaOH + BaSO4 Ba(OH)2 + Na2SO4 -> 2NaOH + BaSO4 This is a Double Replacement Reaction! In the demonstration the Barium Sulfate is the precipitate and can be seen in the test tube.
 * __ Formula __**