lab 8.docx - Sumner 1 Alyssa Sumner Paul Buckley Chemistry...

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Sumner 1 Alyssa Sumner Paul Buckley Chemistry 106 lab 22 October 2019 pH range of salts (Lab 8) Color pH range Salt needed Acidic/base/neutral Red <3 FeCl Acidic Orange 3-4.5 K H 2 P O 4 Acidic Yellow 4.5-6 N a 2 S O 4 Acidic Green 7 KCl Neutral Blue 8-11 Na H 2 P O 4 Basic Purple <11 N a 2 C O 3 Basic Write out the hydrolysis reactions (ions reacting with water, leaving out any spectator ions) of every salt you tested. Indicate which species is the acid, base, conjugate acid, or conjugate base if present. If no reaction occurred, write “no reaction.” Fe^3++3 H 2 O Fe(OH)3+3H^+ acid+base CB+CA H2PO4^-1+H2O HPO4^-2+H^+ acid+base CB+CA SO4^2-+H20 HSO4^-+OH^- acid+base CB+CA KCl+H20 No reaction H2PO4^-1+H20 OH^-+HPO4^2- base+acid CA+CB CO3^2-+H20 OH^-+HCO3^- base+acid CA+CB Of all the ions you tested, which acted as an acid and which a base? Acids: Fe3+, H2PO4^-, SO4^2- Bases: H2PO4^-, CO3^2- Find a cation you did not test (from your text, or a reliable webpage) that behaves as an acid and write out its reaction in water.
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