test & result | chemical |
aq. sodium hydroxide = white ppt., soluble in excess | |
aq. sodium hydroxide = white ppt., insol. in ex. | |
aq. sodium hydroxide = green ppt., insol. in ex. | |
aq. ammonia = no or slight ppt. | |
aq. sodium hydroxide = red-brown ppt., insol. | |
aq. ammonia = white ppt., insol. in ex. | |
aq. sodium hydroxide = green ppt., insol. in ex. | |
acidify, then add aqueous barium nitrate = white ppt. | |
acidify with dillute nitric acid, then add aqueous lead(II) nitrate = yellow ppt. | |
damp red litmus paper turns blue | |
aq. sodium hydroxide = ammonia produced on warming | |
aq. ammonia = light blue ppt., sol. in ex. gives dark blue solution | |
| test & result | chemical |
bleaches damp litmus paper | |
'pops' with a lighted splint | |
aq. ammonia = red-brown ppt., insol. | |
add aqueous sodium hydroxide, then aluminum foil; warm carefully = ammonia produced | |
aq. ammonia = white ppt., solub. in ex., colourless sol. | |
aq. sodium hydroxide = light blue ppt., insol. in ex. | |
aq. sodium hydroxide = white ppt., solub. in ex., colourless sol. | |
add dilute acid = effervescence, carbon dioxide produced | |
relights a glowing splint | |
acidify with dilute nitric acid, then add aqueous silver nitrate = white ppt | |
Ca(OH)2 (lime water) becomes milky | |
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