*No one can help me, could u? Its about chemical equations.?

Question

First of All, could someone explain what synthsis, decomposition, and single replacement mean?
And heres four equations im having trouble balancing and identifying the category of reaction.
____Zn(s)+______HCl(aq) => __ ____+___ ________
_______Mg+____H3PO4 =>____ _________+__ ______
_____Al2O3(s) =>___________Al(s)+___ __________
KClO3(s) => _______O2(g)+______ _________

could you please help me how to do this,, please i need to study for the exam

Please explain it to me as i was a retard

Answer 1

I answered your last question with:
Synthisis is when two or more compounds (or elements) are combined to make a more complex compound.
For example: 2H2 + O2 => 2H2O

Decompisition is when a compound is broken down into its components.
For example: CO2 => C + O2

Single replacement is when the metal in one compound is switched with a lone metal.
For example: K2SO4 + Li => Li2SO4 + K

2Zn + 2HCl => 2ZnCl + H2 Single Replacement
3Mg + 2H3PO4 => 3H2 + 2Mg3(PO4)2 Single Replacement
2Al2O3 => 4Al + 3O2 Decompisition
2KClO3 => 3O2 + 2KCl Decompisition

Remmeber that H and O are diatomic elements and therefore exisit in nature with two atoms rather than one. Suchly is why I use O2 and H2 in the equations.

To the guy below, you got the right idea, but these are actually reaction prediction equations, so you have to take the products and reactants given to determine (predict) the most common results of the reaction.

Answer 2

1. Zn+2HCL===>H2+ZnCl2 ---Hydrogen is lower on the activity series of metals, so Zinc replaces Hydrogen. Zinc has an oxidation number of 2 so 2 Cl are needed to take away the electrons that zinc have. Redox equations are always fun x3.
2. 2Mg+2H3PO4===>2MgPO4+3H2
3. 2Al2O3===>4Al+3O2-Decomposition reaction
4. 2KClO3===>2KCl+3O2-Decomposition reaction

Answer 3

You specific??? by way of fact the reaction is this... Na2CO3 + HCl --> NaCl + H2CO3 yet (assuming you recognize what the different compounds are) the H2CO3 will greater desirable decompose into water and carbon dioxide is Na2CO3 + 2HCl --> 2NaCl + H2O + CO2 You extra sodium carbonate to hydrochloric acid... the effect is salt + water + carbon dioxide gas. All of it extremely is colourless which you would be able to no longer have seen any replace yet it extremely is the approach wish it helps playstation try it back :-)

Answer 4

Equation 2 above is wrong.

It should be:

3Mg + 2H3PO4 ----> Mg3(PO4)2 + 3H2

You over the pond would probably call this single replacement, because the Mg has replaced the H in the acid.