Prelab 396R

Prelab 396R - b cation – a positively charged ion c net...

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KEY to PRELAB 396: Introducing the Qualitative Analysis of a Group of Cations 1. a. Barium nitrate is toxic and an oxidant; lead (II) nitrate is toxic, an irritant and an oxidant; HCl is toxic and corrosive. b. Always wash your hands. This needs to be done so that none of the reagents will be transferred to your mouth or skin by contact with your hands. 2. a. qualitative analysis – an analysis that uses multiple reactions to test for and identify the specific ions that are present in a mixture.
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Unformatted text preview: b. cation – a positively charged ion c. net ionic equation – a chemical equation that shows only those ions and molecules that react. Spectator ions are omitted from the net ionic equation. 3. a. Pb(NO 3 ) 2 (aq) + 2 KOH (aq) Pb(OH) 2 (s) + 2 KNO 3 (aq) b. Pb 2+ (aq) + 2 NO 3-(aq) + 2K + (aq) + 2 OH-(aq) Pb(OH) 2 (s) + 2 K + (aq) + 2 NO 3-(aq) c. Pb 2+ (aq) + 2 OH-(aq) Pb(OH) 2 (s) 4. Pb(NO 3 ) 2 Ba(NO 3 ) 2 Fe(NO 3 ) 3 KSCN HCl Na 2 SO 4 NaCH 3 COO or NaC 2 H 3 O 2...
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