about small quantity of solid KBr to a small, clean test tube. Into the test-tub

Question

about small quantity of solid KBr to a small, clean test tube. Into the test-tube add 1 of cyclohexane and 0.5 ml, of water, Shake the test-tube and note the appearance of the cyclohexane layer. 0.5 of water (cla in water) to your test-tube. Note the formation of distinct layers identify which layer is Shake the test-tube and note change in the appearance of the layer. discard your solution. Repeat this experiment using Klinstead of KBr Do not discard your solution. To the first test-tube (with KBradded), add a small amount of To the second test. tube (with KI added), add a small amount of Br, Shake the test-tubes and note any changes.

Explanation / Answer

When KBr is only added, it will present in the water layer and no colur colur appears in both layers.

But when we add Cl2 water and shaken the mixture, it replaces Br-,

Cl2 (aq.) + 2 Br - (aq.) -----------> Br2 (l) + 2 Cl- (aq.)

Now, Bromine dissolves more in cyclohexane than in water, so int enters into cyclohexane layer due to which it appears as reddish brown colour.

If we have KI instead of KBr, then Cl2 replaces I- ,

Cl2 (aq.) + 2 I- (aq.) -------------> I2 (s) + 2 Cl- (aq.)

Again Iodine is more soluble in cyclohexane than in water, it enters into cyclohexane layer due to which this layer appears as violet colur.

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.