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

 

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

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

 

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

Magnesium Chloride + Hydrogen gas + water.

 

acid + metal = salt + water (and a gas on occasion)

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

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

You missed the water out YT! Water is also produced in the reaction

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

oh ok. Didn't know that... something that can help me for my GCSE!

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

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-

 

 

Shouldn't it be H+ ions?

Well H+ and H2O ions = H3O right...

 

I Guess You Could say H+ as well...

 

But like i said ... [H3O is actually (H+) and (H2O)]

 

sorry if im gettin confusing...

 

cheerz

hmmm..... I though H20 doesn't from an ion! When balancing ionic equatons, water is just counted as water. It contains H= on OH- ions. This makes it neutral ---> No charge ---> no ion!

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

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!

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

Oh well! When you are through with the GCSEs (like me, I am doing the exams right now!), your gonna hate it like anything!

lol Probably... O well... ur chemistry seems pretty good... Keep in touch;)

 

Since im in Malaysia, its the International GCSE's so may be different... but in any case...

 

thxz

Your welcome! My favourte subject is chemistry, so I have to be good at it! I want to become a chemical engineer when I grow up!