Why are most organic compounds nonconducting and insoluble in water?
check all that apply.
most organic compounds don't dissolve in water because they are polar.
most organic compounds don't dissolve in water because they are nonpolar.
they don't conduct electricity because they are ionic, not covalent.
they don't conduct electricity because they are covalent, not ionic.

Explanation:

It is known that like dissolves like which means that polar substances are able to dissolve only in polar solvents.

Whereas non-polar substances are able to dissolve only in non-polar solvents.

As all organic compounds are non-polar in nature so, they are only soluble in non-polar solvents.

On the other hand, water is a polar solvent and its dissolves substances like NaCl, etc that are also polar in nature.

Also, for a solution to conduct electricity it is necessary that there must be flow of ions from one place to another. But a non-polar or organic substance do not dissociate into ions when dissolved in water.

Hence, it is unable to conduct electricity.

Thus, we can conclude that most organic compounds are non-conducting and insoluble in water because:

when 25.0 ml of 0.700 mol/l naoh was mixed in a calorimeter with 25.0 ml of 0.700 mol/l hcl, both initially at 20.0 °c, the temperature increased to 22.1 °c. the heat capacity of the calorimeter is 279 j/°c.

the equation for the reaction is:

naoh + hcl → nacl + h₂o

moles of hcl = 0.0250 l hcl ×

0.700

mol hcl

1 l hcl = 0.0175 mol hcl

volume of solution = (25.0 + 25.0) ml = 50.0 ml

mass of solution = 50.0 ml soln ×

1.00

ml soln

= 50.0 g soln

δt=t2-t1

= (22.1 – 20.0) °c = 2.1 °c

the heats involved are

heat from neutralization + heat to warm solution + heat to warm calorimeter = 0

q1+q2+q3=0

nδh+mcδt+cδt=0

0.0175 mol ×

δh

+ 50.0 g × 4.184 j·g⁻¹°c⁻¹ × 2.1 °c + 279 j°c⁻¹ × 2.1 °c = 0

0.0175 mol ×

δh

+ 439.32 j + 585.9 j = 0

0.0175 mol ×

δh

= -1025.22 j

δh=1025.22j0.0175 mol= -58 600 j/mol = -58.6 kj/mol