6 ) Mix 5 ml of 0.1 M (CH:ICOO)~ P h solution with 5 ml of 0.1 M NarSOI solution. Then add 5 mlof0.2 M KrCrOn solution. Stir. Why did the precipitate change color?
1;rrrup C-l'rrrprrli~s of Caws 7) Light a candle. Invert a small heaker and lhwcr it over the candle flame, holding it in this position for a few seconds. Why was the flame extinguished? 8) Open a lhclttle r,froncentrated hydrochloricacid. Wait. Why did t h e fumes issue fwm t h e open mouth o f t h e bottle? Group D-TI,? E1~mrnl.sof Croup I nnd Their compound,^ 9 ) Saturate 150 ml d n m e e n t r a t e d ammonium hydnxidesoluticm wilh wdium chloride. I h p small pieces of Dry Ice into the mixture. W h v d i d a ureriuitate fiwm?
Crrrup F-Oxidnlion-Rup /r I1 ond Thcir C < m p o u , d s 12) 1'0 I 0 ml 01 1 M Hp (NO.,).?solution add, drnp by drop, with stirring, several milliliters of I M 1
