Identify the salts that are in hard water. CaCO 3 and MgCO 3 MgSO 4 and CaSO 4 N
ID: 835669 • Letter: I
Question
Identify the salts that are in hard water.
CaCO3 and MgCO3
MgSO4 and CaSO4
NaCl and KBr
NaHSO4 and Na2SO4
NaOCl and HOCl
Consider a reaction that has a positive ?H and a positive ?S. Which of the following statements is TRUE?
This reaction will be spontaneous only at high temperatures.
This reaction will be spontaneous at all temperatures.
This reaction will be nonspontaneous at all temperatures.
This reaction will be nonspontaneous only at high temperatures.
It is not possible to determine without more information.
a.CaCO3 and MgCO3
b.MgSO4 and CaSO4
c.NaCl and KBr
d.NaHSO4 and Na2SO4
e.NaOCl and HOCl
Explanation / Answer
MgSO4 and CaSO4
2.
This reaction will be spontaneous only at high temperatures.
b.MgSO4 and CaSO4
2.
a.This reaction will be spontaneous only at high temperatures.