Answer:
56 %
Explanation:
The percent dissociation of a weak acid can be defined as:
Moles of weak acid that produced H₃O⁺ species / Total number of weak acid moles * 100%
We are given all the required data to <u>calculate the percent dissociation</u>:
0.42 mol / 0.75 mol * 100 % = 56 %
The percent dissociation is 56%.
Answer:
C. 500 cm' of 1.0 mol dmº magnesium sulphate solution.
Explanation:
Let us look at each of the solutions individually;
CaCl2 has three particles
K2SO4 has three particles
MgSO4 has two particles
C2H5OH has only one particle
The number of moles of moles in 250 cm of 2.0 mol dm-3 potassium chloride is 250/1000 * 2 = 0.5 moles having two particles
Also; number of moles in 500 cm' of 1.0 mol dm-3 magnesium sulphate solution= 500/1000 * 1 = 0.5 moles having two particles
C. Sugar is the solute and water is the solvent since sugar is the one dissolving and water is what the sugar is dissolving in.
The correct answer is freezing point
Force of the collisions increases due to increase in temperature.
Explanation:
Increase in temperature affects the average speed and kinetic energy of the particles.
The average speed of the gas particles gets increased , Kinetic energy of the gas particles also gets increased.
If the volume is held constant, the increased speed of the gas molecules results in more frequent and more forceful collisions with the walls of the container, therefore increasing the pressure.
Therefore, force of the collisions increases due to increase in temperature.