[The Bright Beast]

1. write a half equation for reaction between calcium ions and hydroxide ions
2. write a half equation for reaction between barium ions and chromium ions

for 1. is this right:

Ca^2- + 2OH⁺ -> Ca(OH)₂

and for 2, what are the products?

[ch0wm4n]

(Original post by The Bright Beast)
1. write a half equation for reaction between calcium ions and hydroxide ions
2. write a half equation for reaction between barium ions and chromium ions

for 1. is this right:

Ca^2- + 2OH⁺ -> Ca(OH)₂

and for 2, what are the products?

For the first one you need to swap the signs around, Ca is 2+ and OH is 1-, you might want to add state symbols as well.

Not sure about second one, will edit if i work it out.

[The Bright Beast]

haha thanks

and from 1, I deduced 2 should be BaCrO₄

[Acetic]

These are ionic equations not half equations. Half equations are written for redox processes and involve electrons.