It is false, evaporation is when water vapor heats and goes from a liquid to a gas. The change of state from solid directly to gas is called sublimation
No, the properties of a substance are not affected by the amount of a substance.
First, we have to see how K2O behaves when it is dissolved in water:
K2O + H20 = 2 KOH
According to reaction K2O has base properties, so it forms a hydroxide in water.
For the reaction next relation follows:
c(KOH) : c(K2O) = 1 : 2
So,
c(KOH)= 2 x c(K2O)= 2 x 0.005 = 0.01 M = c(OH⁻)
Now we can calculate pH:
pOH= -log c(OH⁻) = -log 0.01 = 2
pH= 14-2 = 12
2H2O➡2H2+O2 is the correct balanced equation of decomposition
Because decomposition means a molecule breaking down in to segments
