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Published byArleen Allison Modified over 7 years ago
7.8 By: Charles and Dan Period H
A single replacement reaction is when atoms of one element replace the atoms of another compound. (Please now take out your periodic tables and flip them over to the back. Look at the bottom right corner.)
NameSymbol Lithium Potassium Barium Strontium Calcium Sodium Magnesium Aluminium Manganese Zinc Chromium Li K Ba Sr Ca Na Mg Al Mn Zn Cr Decreasing Activity *Metals from Li to Na will replace H from acids and water; from Mg to Pb will replace H from acids only NameSymbol Helium Nickel Tin Lead (Hydrogen)* Antimony Copper Mercury Silver Palladium Gold He Ni Sn Pb (H)* Sb Cu Hg Ag Pd Au
To balance this, balance as you would any other reaction. Cl 2 + NaBr NaCl + Br 2 Cl 2 + 2NaBr 2NaCl + Br 2
1.) What is the formula -before and after the reaction- when Lithium replaces Hydrogen in Hydrochloric acid? 2Li + 2HCl 2LiCl + H 2 2.) What is the name of the compound and element when Aluminum replaces Hydrogen in the compound Water? No Reaction! 3.) Name 3 elements that Sodium CAN’T replace in a compound Calcium, Potassium, and Lithium
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Usually, a solid is added to a compound. An element with a high activity level will only replace elements with a lower activity level.
If you have Mercury (Hg) and Water (H 2 O), what will the outcome be if a Single-Replacement Reaction occurred? (Hint: Use the table on the back of your Periodic Table!)
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