Question 8

in a titration, 25.0 ml of 0.500 m khp is titrated to the equivalence point with naoh. the final solution volume is 48.5 ml. what is the value of m2 for the reaction?

0.256 m

0.532 m

0.970 m

0.500 m

Answer : The value of (concentration of NaOH) for the reaction will be, 0.532 M

Explanation :

Using neutralization law,

where,

= basicity of an acid (KHP) = 1

= acidity of a base (NaOH)  = 1

= concentration of = 0.500 M

= concentration of NaOH = ?

= volume of = 25 ml

= volume of NaOH = 48.5 - 25 = 23.5 ml

Now put all the given values in the above law, we get the concentration of the .

Therefore, the value of (concentration of NaOH) for the reaction will be, 0.532 M

the best answer is d because the strong cohesion is caused by the ability of water molecules to undergo hydrogen bonding.

a is incorrect because when water solidifies, it becomes   ice, which expands and occupies a bigger volume for the same mass of water in its liquid state.

b is incorrect because water has high surface tension. besides bonding to itself it hydrogen bonds to other molecules at the top decreasing possibility for breaking of attractive forces.

c is incorrect because the water molecule has oxygen which is highly electronegative and so pulls the electron pair towards itself creating a dipole moment, making the molecule polar.

e is incorrect because water has strong adhesion, ability to stick to other molecules such as glass because of this molecules having stronger hydrogen bonding than water.