CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon


Question

Calculate the mass of K2Cr2O7 in grams required to produce 254 g I2 from KI solution.
 K2Cr2O7+KICr3++I2

(Molar mass of K2Cr2O7 is 294 g mol1)


Solution

K2+6Cr2O7+K1I+3Cr3++0I2

nf=(|Change in O.S.|)×Number of atoms
nfK2Cr2O7=|+3(+6)|×2=6
nfI2=|0(1)|×2=2

From the law of equivalence,
Equivalents of K2Cr2O7=Equivalents of I2
WK2Cr2O7294×6=254254×2
 WK2Cr2O798 g

flag
 Suggest corrections
thumbs-up
 
0 Upvotes


Similar questions
View More



footer-image