Double arrow means reversible reaction while single arrow represents complete reaction.For strong acid such as HCl,they undergo ionization to form H+ and Cl-.For weak acid such as H2CO3,it undergoes reversible reaction.
H2CO3->H+ + HCO3-
HCO3- <->H+ + CO3 2-
You use a double arrow to show that the reaction runs both ways; forward and backward.
because the reaction of dissociation is At any one time virtually 100%
The common abbreviations for state are (s) for solid, (g) for gas, (l) for liquid, and (aq) for aqueous solution. Of these, (aq) and (s) are likely to be the important ones for precipitation. Sometimes a down arrow is used to emphasize that a precipitate is formed.
A double arrow shows that the reaction is reversible, it represents an equilibrium in which the products on the right can react together and produce the left hand side. A chemical equation without a double arrow isn't reversible and can only go in one direction.
double arrow
Equilibrium, where the rate of the forward reaction is equal to the rate of the reverse reaction.
because the reaction of dissociation is At any one time virtually 100%
arrow in heel
This depends on how the double arrow is drawn. Most of the lines if not all will be parallel.
See related links for a picture of a cursor double-headed arrow.
Double up arrow or double down arrow + Grind
On the drawing toolbar, go to autoshape->connectors, and the double arrow is in there.
An arrow is a graphical symbol used to point or indicate direction.
This means that the reaction in question takes place in an aqueous solution. Even when water does not take part in a reaction, many things - most things, actually - will be more chemically active if dissolved in water, than in solid form.
The common abbreviations for state are (s) for solid, (g) for gas, (l) for liquid, and (aq) for aqueous solution. Of these, (aq) and (s) are likely to be the important ones for precipitation. Sometimes a down arrow is used to emphasize that a precipitate is formed.
Arrow
They are arrow points and double arrow points
in ps2 press l3 then press down arrow left arrow circle