WEAKER ACID? HIGHER KA? OR LOWER?

[matt123]

hey guys
if an acid is WEAKER .. will it have a smaller or higher KA than a stronger acid?

[samiira]

the weaker the acid, the smaller the ka

[m@tty]

One way to view this is that because and remembering that a higher value of indicates that the reaction occurs to a greater extent. Similarly a smaller , or , value means that the yield at equilibrium is lower.

So just apply the same rules that you normally do for the equilibrium constant.

Or from a more conceptual stance, remember that products are on top, so a bigger value indicates a higher proportion of ionisation.. And, again, a lower is indicative of a weaker acid.

[matt123]

One way to view this is that because and remembering that a higher value of indicates that the reaction occurs to a greater extent. Similarly a smaller , or , value means that the yield at equilibrium is lower.

So just apply the same rules that you normally do for the equilibrium constant.

Or from a more conceptual stance, remember that products are on top, so a bigger value indicates a higher proportion of ionisation.. And, again, a lower is indicative of a weaker acid.

Cheers mate.