chemistry C3

  • 2 votes

could anyone explain to me why acids create hydrogen plus ions in water and alkalis produce hydroxide negetive ions?

Posted Sat 19th May, 2012 @ 15:11 by molly:)

7 Answers

  • 2 votes

i have done exam  it was really easy aqa c3

Answered Thu 24th May, 2012 @ 17:15 by calum
  • 1 vote

Acids are ionic (i think), so in water the different ions split up. As all acids are partly hydrogen this is one of the products. It is positively charged as hydrogen loses 1 electron to become a ion. Alkalis have to contain hydroxide ions, which are again split in water, but i'm not really sure why they are negative

Answered Mon 21st May, 2012 @ 18:31 by Maddie
  • 1 vote

Acids are acids because they contain H+ Ions. (alkalis are H- / OH-)
When it is neutralised, the ions in the acid gain the elections they need and form molecules of Hydrogen gas. (2H- + 2e- --> H2) (N.B. acid + water is an exothermic reaction) 

Answered Tue 22nd May, 2012 @ 22:52 by Sophie :o)
Edited by Sophie :o) on Tue 22nd May, 2012 @ 22:55
  • 1 vote

Bronsted and Lowry explained behaviour of acids and bases (alkalis are soluble bases) and found that acids dissociate (ionise or split up) to form H+ ions and called them proton donors (H+ ion is a proton) because they 'donated' the H+ ions. Eg. HCl(g) + H20(aq) = H+(aq) + Cl-(aq) They also found that alkalis dissociate to form OH- ions and called them proton acceptor because they 'accept' the H+ ions. Eg. NaOH + H2O(aq) = Na+ + OH-(ag)

Answered Mon 28th May, 2012 @ 12:45 by Rachel
  • 0 votes
Answered Sat 19th May, 2012 @ 16:33 by anonymous
  • 0 votes

C3 is quite easy it is mostly rates of reaction-more successful collisions=faster rate of reaction

Answered Thu 7th June, 2012 @ 22:48 by T
  • -1 votes

it s a neutralization reaction  

Answered Sat 19th May, 2012 @ 15:13 by sahb2397