CaO can be used as a drying agent. One such application occurs when water is added to dry concrete or cement. The reaction that occurs is CaO(s)+H2O(l)âCa(OH)2(s)

The product is commonly called slaked lime.

Assuming the commonly used standard-state temperature of 25âC, calculate ÎSuniv for this reaction using table from the table below.

Substance Sâ [J/(Kâmol)] ÎHâf (kJ/mol)
CaO(s) 39.9 â635.1
H2O(l) 69.9 â285.8
Ca(OH)2(s) 83.4 â986.1

1) in saturated limewater, [h+ ]=3.98x10-13 m. a) find [oh]-/ b) what is the ph? / c) is the solution acidic, basic, or neutral? / 2) in butter, [h+ ]=6.0x10-7 m. a) find [oh]-/ b) what is the ph? / c) is the solution acidic, basic, or neutral? / 3) in peaches, [oh]=3.16x10-11 m a) find [h+ ]/ b) what is the ph? / c) is the solution acidic, basic, or neutral? / 4) during the course of the day, human saliva varies between being acidic and basic. if [oh]=3.16x10-8 m, a) find [h+ ]/ b) what is the ph? / c) is the solution acidic, basic, or neutral? /

The tendency of water molecules to stick together is referred to as a) adhesion b) polarity c) cohesion d) transpiration e) evaporation

Quiz1. which physical state of nitrogen has the highest entropy? a solid© b gasoc liquid