Briefly explain the hazards associated with the H2O2 and NH3 solutions. 3(1)- ba

Question

Briefly explain the hazards associated with the H2O2 and NH3 solutions.
3(1)- based upon the principals disscus in this experiment.... 3(2)-would you expect aluminum.... Please help me with questions 1, all of 3, and 4 ns Oy and N, solutions used in this experiment You heat each xide in a sert a glowing splint into each tube. The splint burs nto fame in test tube 1, but not in ube 2.Wha 2. The denality of air at 0 C and 700 tor is 1.2929 L-, and the denaity of Og under the same conditions is O collected in the second, ind. and lourth bottles 02 Is more dense than aiY So ie air will no displace the 02 3. Aluminum (A is a reactive metal A new Al pan when it is not used a) Would you expect aluminum oxide to decon pose readly upon heating? Briely esplain

Explanation / Answer

1.Hazards with hydrogen peroxide ( H 2O2) and ammonia solutions:-

Pure H2O2 solution can cause chemical burns, eye injury. It is explosive and can catch fire, violently oxidises organic material.

Concentrated ammonia also causes chemical burns, eye injury, lung damages due to fume inhalation.

Mixture of pure ammonia and very concentrated or pure hydrogen peroxide constitute a fuel and oxidant mixture and can ignite or explode with very little provocation.

3.1. Aluminum is a reactive metal and it gets oxidised when comes in contact with air . It forms it's respective oxide (Al2O3) which prevents aluminium from further corroision. Hence Al pan becomes dull when it is not used .

The reaction takes place as follow-

4Al (s)+ 3O 2(g) ———> 2Al2O3(s)

3.2. Aluminum oxide does not decompose readily on heating. Since this reaction is endothermic in nature and it requires a large amount of heat for the thermal decomposition.

This is shown in the reaction given below:-

Al 2O 3(s) ———> 2Al(s) + 3/2 O 2 (g) rH= 1676 kJ/mol

Where rH is the enthalpy of the reaction. So the reaction is enthalpically not favourable.

Related Questions

Navigate

• Browse (All)
• Browse B
• Subjects

---

---

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