As 1 g of sodium hydroxide dissolves in 100g of water, the conductivity of the water:
1. decreases
2.increases
3. remains the same

The conductivity of the resulting solution will increase.

Explanation:

The conductivity of the solution obtained by adding sodium hydroxide in water will increase as compared to pure water due to complete dissociation of sodium hydroxide into sodium ion and hydroxide ions. The conductivity increases on increase in number of ions in a solution.

The conductivity depends upon

a) number of ions

b) mobility of ion.

a  solution  is always transparent, light passes through with no scattering from solute particles which are molecule in size. the  solution  is homogeneous and does not settle out. a colloid is intermediate between asolution  and a  suspension. while asuspension  will separate out a colloid will not.

answers: to make sure that all of the broken pieces of tablet were added to the water, to allow for fair comparison of all three trials, with different particle sizes to avoid experimental error