. 2NH4CIO4 ^ N 2+ CI 2+ 2O 2+ 4H2O
5.46. Cho khf clo di qua dung dich natri bromua, ta thdy dung dich cd mau
vang. Tiép tuc cho khf clo di qua, ta thdy dung dich mdt maụ Ldy vdi gigt dung dich sau thf nghiem nhd len gidy quy tfm thi gidy quy hod đ. Hay giai thfch cdc hien tugng vd vidt cdc phuang trinh hod hgc.
5.47. Binh A chfta đy khf hidro bromuạ Binh B chi chfta khdng khf. Dl chuyin hidro bromua tft binh A sang binh B cd thi lam nhu thd nao ? Vi sao cd thi ldm dugc nhu vdy ?
5.48. Ndu mdt 1ft nudc hod tan 350 1ft khf hidro bromua (d dktc) thi ndng đ phdn trdm cfta dung dich axit bromhidric thu dugc la bao nhieu ?
5.49. Dl dilu chi HCI ngudi ta cho NaCl tdc dung vdi axit sunfuric đc. Tai sao khdng dung phuang phap tuong tu dl dilu chd HBr ? Ngudi ta dilu chd HBr bdng each ndo ?
5.50. Cho 6 g brom cd ldn tap chd't la clo vao mdt dung dich cd chfta 1,6 g kali bromua vd Idc diu thi toan bd clo du phan ftng hit. Sau đ lam bay hai hdn hgp sau thf nghiem vd sdy khd chdt rdn thu dugc. Khd'i lugng chdt rdn sau khi sdy la 1,36 g. Tfnh ham lugng phdn trdm cfta d o trong loai brom ndi tren.
5.51. Hdn hgp rdn A chfta kali bromua vd kali iotuạ Cho hdn hgp A vao nudc brom (ldy du). Sau khi phan ftng xong, lam bay hoi dung dich va nung ndng ta dugc san phdm rdn khan B. Khdi lugng cfta B nhd hon khd'i lugng
A m gam. Cho san phdm B vao nudc clo (ld'y du). Sau khi phan ftng xong,
lam bay hoi dung dich va sd'y khd ta dugc san phdm rdn khan C. Khdi
lugng cfta C nhd hon khd'i lugng cua B m gam. Tfnh phdn tram khd'i lugng
tftng chd't trong Ạ
Bai 36 IOT
5.52. lot dugc bdn tren thi trudng thudng cd chfta cdc tap chdt la clo, brom va
nudc. Di tinh che loai iot đ ngudi ta nghiln nd vdi kali iotua va vdi sdng
rdi nung hdn hgp trong cdc dugc đy bdng mdt binh cd chfta nudc lanh. Khi đ iot se bdm vao day binh.
Hay giai thfch each lam ndi tren. Vidt cac phuang trinh hoa hgc ciia phan ling.
5.53. Ndu cho NaCl rdn tdc dung vdi H2SO4 dac, ta thu dugc khf HCỊ Neu thay NaCl bdng Nal, ta khdng thu dugc HI ma thu dugc I2 rdn cung vdi khf H2S. Hay vidt phuang trinh hod hgc cfta phan ftng gifia Nal va H2SO4 đc. Dd la loai phan ftng gi ? Vi sao Nal tham gia loai phan ftng nay ma NaCl lai khdng ?