Show all work and the answer to the correct units, the correct number of signifi
ID: 973913 • Letter: S
Question
Show all work and the answer to the correct units, the correct number of significant figures and or scicntific notation where necessary for full credit. The cations of Group III are The eations of Group IV are 1. What method would you use to separate Group III cations from Group IV cations? 2. A solution contains Cr^-3 or Ni^+2 ion. Describe a reaction with a single reagent that will identify which ion is present. 3. A solid is known to be either BaCO_3 or CaCO_3. If is dissolved in 6M acctic acid. A pule yellow precipitate forms when K_2CrO_4 solution is added. The subsequent flame test with that precipitate shows an orange-red color. Which cation is present? Briefly explain?Explanation / Answer
1)
III Fe,Al,Cr
IV Ca,Ba,Sr
controling the pH add NaOH and the group III formed a solid like whit OH-
and later add (NH4)2CO3 precipete like a solid the group IV
2) With dimethylglyoxime gives a precipitate of red
3) Ca gives a color red to flame test