1 mole of each of the following substances is dissolved in 1 L of water. Order them from most ions (1.) to least ions (4.) in solution.
CH2CH2-OH
ZnCl2
H2SO3
NaNO3
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To determine the order of these substances from most ions to least ions in solution, we need to consider the number of ions that each substance dissociates into when dissolved in water.
CH2CH2-OH:
Ethanol (CH2CH2-OH) does not dissociate into ions when dissolved in water. It remains as a molecule. Therefore, it does not contribute any ions to the solution.
ZnCl2:
Zinc chloride (ZnCl2) dissociates into three ions when dissolved in water: one zinc ion (Zn2+) and two chloride ions (2Cl-).
H2SO3:
Sulfurous acid (H2SO3) dissociates into two ions when dissolved in water: one hydrogen ion (H+) and one bisulfite ion (HSO3-).
NaNO3:
Sodium nitrate (NaNO3) dissociates into two ions when dissolved in water: one sodium ion (Na+) and one nitrate ion (NO3-).
Now let's order them based on the number of ions:
1. ZnCl2 - It dissociates into three ions (1 zinc ion and 2 chloride ions).
2. H2SO3 - It dissociates into two ions (1 hydrogen ion and 1 bisulfite ion).
3. NaNO3 - It dissociates into two ions (1 sodium ion and 1 nitrate ion).
4. CH2CH2-OH - It does not dissociate into any ions.
So, the order from most ions (1) to least ions (4) is:
1. ZnCl2
2. H2SO3
3. NaNO3
4. CH2CH2-OH