Answer:
The correct option is;
D. Calcium chloride breaks into 3 ions, while sodium chloride only breaks into 2 ions
Explanation:
To help melt the ice on icy streets, calcium chloride (CaCl₂) is a more preferred salt type to sodium chloride (NaCl) as when it dissociates into ions in the ice, it forms three ions: a calcium ion, Ca²⁺, and two chloride ions, 2 Cl⁻, while sodium chloride forms two ions: one sodium ion, Na⁺, and one chloride ion, Cl⁻
According to the freezing point depression equation, we have;
ΔT =
× m × i
Where;
ΔT = Change in freezing point temperature
= The freezing point depression constant
m = The solution's molality
i = van't Hoff factor
The calcium chloride salt will cause the most depression because the van't Hoff factor is 3 for calcium chloride and 2 for sodium chloride.
Answer: 10.5 hope this helps!
A. ATOMS CAN NOT BE DIVIDED (INDIVISIBLE)
Answer:
Acetic acid is a weak monoprotic acid.
In aqueous solution it has a pKa value of 4.76.
It conjugate base is acetate (CH3COO-) A 1.0m
solution ( about the concentration of domestic vinegar) has pH of 2.4, *indicating that merely
0.4% of the acetic acid molecules are dissociated.
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