In the equation:


Why is the hydrogen by itself instead of the chlorine?

Al is above hydrogen in the activity series (sometimes called the electromotive force series); therefore, it replaces H. This is single replacement type reaction.

Isn't Al above Cl too?

Yes, it is. And for exactly that reason, it is easier to oxidize Al than it is to oxidize Cl^-. So Al is oxidized, H^+ is reduced (to H2 gas) and the Cl^- is merely a spectator ion.
2Al + 6H+ ==> 2Al+++ + 3H2

That's why Cl shouldn't be alone?

Yes. That's why Cl^- stays as is.

Why is Al easier to oxidize?

I suppose the easy answer is "that's the nature of the beast." But that isn't really an answer. The question is much like "Why do we call a car a car or a horse a horse or a cow a cow?" Because someone named them that. The best answer I can give as to why Al is easier to oxidize is that the three outside electrons on the aluminum atom can be stripped MUCH easier (leaving the Al+++) than it is to strip electrons from a chloride ion (especially with the ion already bearing a -1 charge). Another way of saying it is that it is MUCH easier for Cl2 (gas) to act as an oxidizing agent (thereby being reduced) than it is for the reaction to proceed in the other direction (from Cl- to Cl2. We can ask "Why" for that too, and the answer is "that's an exerimental fact."


  1. 👍
  2. 👎
  3. 👁

Respond to this Question

First Name

Your Response

Similar Questions

  1. Chemistry

    Given the following equation : 2Al+6HCl 2AlCl 3 +3H 2 If 3.00 grams of H 2 were produced, how many grams of Al reacted ? (Molar mass of Al = 26.98g / (mol) , molar mass of H 2 = 2.016 g/mol)

  2. antari

    Calculate the mass of hydrogen formed when 25 grams of aluminum reacts with excess hydrochloric acid. (AM of Al= 26.9g/mol) 2Al + 6HCl ----> Al2Cl6 + 3H2

  3. Chemistry

    In the reaction Al2S3(s) + 6HCl(aq) --> 2AlCl3(aq) + 3H2S(g), how many moles of HCl are used for each mole of AlCl3 formed? A.0 B.2 C.3 D.1 E.1.5 where do you start and how do you figure it out?

  4. Chemistry

    In a reaction chamber, 3.0mol of aluminum is mixed with 5.3mol Cl2 and reacts. The reaction is described by the following balanced chemical equation. 2Al + 3Cl2 ==> 2AlCl3 a)Identify the limiting reagent for the reaction.

  1. Chemistry

    2Al(s) + 6H+(aq) → 2Al3+(aq) + 3H2(g) For the above Al-H2 cell, what is the voltage if [Al3+] = 6.0461 M, [H+] = 6.1 M, and the hydrogen pressure is 0.0557 atm. Eo = 1.66 V. .00004-(.05916/6)*log(7.1e-4) =.03 WRONG ANSWER I GOT

  2. Chemistry

    In order for the reaction 2Al(s) + 6HCl(aq)→2AlCl3(aq) + 3H2(g) to occur, which of the following must be true? A. Al must be above Cl on the activity series. B. Al must be above H on the activity series. C. Heat must be supplied

  3. Chemistry

    What is the minimum amount of 6.0 M H2SO4 necessary to produce 19.0 g of H2(g) according to the reaction? 2Al(s)+3H2SO4(aq)→Al2(SO4)3(aq)+3H2(g)

  4. Chemistry - Please check

    d) 2Al(s) + Fe2O3(s)  2Fe(l) + Al2O3(s) Oxidation 2Al(s)  2Al+ + 2e- Reduction Fe23+ + 3e-  2Fe(l) Oxidation numbers for chlorine HCl = -1 MnO2(s)= +4 KMnO4(s)= +7 Oxidation numbers for manganese Mn(s)= ? MnCl2(s)= +7

  1. Chemistry

    What is the minimum amount of 6.0M H2SO4 necessary to produce 19.0g of H2(g) according to the reaction? 2Al(s)+3H2SO4(aq)→Al2(SO4)3(aq)+3H2(g)

  2. Chemistry

    What is the limiting reactant is if 0.5gAl is reacted with 3.5gCuCl2? 2Al(s)+3CuCl2(aq) --> 3Cu(s)+2AlCl3(aq)

  3. Chemistry

    How many grams of aluminum chloride are produced when 18 g of aluminum are reacted with an excess of hydrochloric acid? 2AL(s) + 6HCl(aq) ---> 2AlCl3(aq) + 3H2(g)

  4. CHEM-last part prob.

    Aluminum reacts with chlorine gas to form aluminum chloride via the following reaction: 2Al(s) + 3Cl2(g) -> 2AlCl3(s) You are given 19.0g of aluminum and 24.0g of chlorine gas. a)If you had excess chlorine, how many moles of of

You can view more similar questions or ask a new question.