Qualitative Analysis a Manual for the Use of Students of Chemistry in Schools a
Qualitative Analysis a Manual for the Use of Students of Chemistry in Schools a
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54 AMMONIUM SULPHIDE GROUP H 2 S0 4 produces no precipitate.
BaC0 3 when shaken with a cold neutral or but slightly acid solu- tion of MC1 2 does not precipitate a compound of nickel. BaCO 3 is most conveniently used for this purpose in a state of suspen- sion in water. The reagent bottle should therefore be shaken before using.
A Borax Bead is colored brown when fused with a compound of nickel. Heat a small loop of clean platinum wire to redness and dip it into pow- dered borax. Heat gently at... first and then fuse until all bubbles dis- appear and a clear bead results. Touch the solid substance to be tested with the hot bead in such a way that a small amount adheres to the bead and fuse again until clear and free from bubbles. Note the color.
COBALT : Reactions of solutions of cobalt salts.
KOH or NaOH precipitates from cold solutions a blue basic salt which when warmed with the alkali changes to Co(OH) 2, pink. Co(OH) 2 may be oxidized to Co(OH) 3, black. The reaction takes place slowly in the air, more readily under the influence of oxidizing agents, such as bromine water in the presence of an alkali (NaOH).
What to read after Qualitative Analysis a Manual for the Use of Students of Chemistry in Schools a?
You can find similar books in the "Read Also" column, or choose other free books by L M Louis Munroe Dennis to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
54 AMMONIUM SULPHIDE GROUP H 2 S0 4 produces no precipitate.
BaC0 3 when shaken with a cold neutral or but slightly acid solu- tion of MC1 2 does not precipitate a compound of nickel. BaCO 3 is most conveniently used for this purpose in a state of suspen- sion in water. The reagent bottle should therefore be shaken before using.
A Borax Bead is colored brown when fused with a compound of nickel. Heat a small loop of clean platinum wire to redness and dip it into pow- dered borax. Heat gently at... first and then fuse until all bubbles dis- appear and a clear bead results. Touch the solid substance to be tested with the hot bead in such a way that a small amount adheres to the bead and fuse again until clear and free from bubbles. Note the color.
COBALT : Reactions of solutions of cobalt salts.
KOH or NaOH precipitates from cold solutions a blue basic salt which when warmed with the alkali changes to Co(OH) 2, pink. Co(OH) 2 may be oxidized to Co(OH) 3, black. The reaction takes place slowly in the air, more readily under the influence of oxidizing agents, such as bromine water in the presence of an alkali (NaOH).
What to read after Qualitative Analysis a Manual for the Use of Students of Chemistry in Schools a?
You can find similar books in the "Read Also" column, or choose other free books by L M Louis Munroe Dennis to read onlineMoreLess
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