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Reaction of Metals with Acids


Guest LoGaN

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Guest LoGaN

Hi im really terrible at Science and we are being given questions like:

 

Magnesium + Hydrochloric acid -----> ----------- + --------------

---------- + ----------- ----------> ------------ + -------------

 

I dont know how to do them :confused: please try and explain to me how thanks.

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Guest LoGaN

thanks thats the kind of answer but how do i get that answer ? cause i need to be able to do them myself

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you have to memorise the basic: Acid + Metal = Salt + Gas

 

metal acid reaction are when the metal replaces the Hydrogen in the acid

 

for instance Mg (metal) + HCl (acid) will make the salt MgCl but what happens to the Hydrogen that`s left over???

 

well that comes away as the Gas part :)

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yes and no.

it`s not always prodused in acid metal synth.

acid / base yes! as in: acid + base = salt + water

 

but HCl(aq) and Mg will only make MgCl and H, the water that remains is only the water that the HCl was dissolved in :)

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K... heres something for the ppl in gcse levels and stuff

 

Acid + Base (Hydroxide) --> Salt+Water

 

Acid + Carbonate --> Salt + Carbon Dioxide + Water

 

Acid + Metal --> Salt + Hydrogen Gas

 

Acid dissolved in water will ionize into two ions:

 

H3O+ ion and the Ion of the conjugate base x-

 

eg.

 

HC2H3O2 in water will become

 

H3O+ C2H3O2-

 

A Metal Hydroxide Dissolved in Water will become

 

Metal (+) ion and OH- ion

 

eg.

 

NaOH dissolved:

 

Na+ OH-

 

The Driving Force to create the salt and water thing is the attraction between the H3O+ and OH- [H3O is actually (H+) and (H2O)] to create the covalent compound water... H2O

 

The remaining ions just bond together to form the salt...

 

Hope that helpz....

 

chill out

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O... ic... sorry... i was taught that the H+ ion is attracted to water itself... as water is an amphiprotic solvent... so it accepts the H+ by acting as a base in this case, to form the H3O+ ion, acting as an acid. True that the H+ ion is released into the water, but it is a result of water being amphiprotic and accepting this extra H+ ion that acids work the way they do. Amphiprotic, by the way (i think u probably know) is when a substance can act as a base and acid, thereby declaring it neutral.

 

i could be wrong... so if neone has anything more on this correct me

 

cheerz

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Well, I myself am at GCSe level. But, I definitely know that water is formed when H+ gets attracted to OH- ions. When you try to ionically balance an equation which involves neutralisation, and water is produced, all that happens is that the H+ ions from the acid attract the OH- ions from the alkali. All the other atoms are spectator ions!

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Thatz true... lol im in form 3/ Grade 9 level.. next year ill be in GCSE. But i studied under canadian syllabus for 7 years. so maybe we learned some different things, or terms for it. True though that the H+ OH- attraction is the driving force. Theres the basic point i believe.

 

Cheerz

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