Balanced Equations And Aqueous Solutions

Question 1

Kc =

Answer 1

(C^c x D^d)/(A^a x B^B)

Question 2

Unit of Kc

Answer 2

Doesnt Have one (Well it changes)

Question 3

Diference between Qc and Kc calculations

Answer 3

Qc Is inital, Kc is at equalibrium

Question 4

Water is a great solvent because..

Answer 4

Water is a great solvent because its polarity and hydrogen bonding allow it to dissolve many ionic and polar substances easily.

Question 5

Unusual Properties Of Water

Answer 5

Very high melting and boiling points, compared to analogous molecules (Similar molecules)
Boiling is pulling particles away from each other, not pulling them apart
The freezing point of water decreases as pressure increases

Question 6

A Solution is formed when..

Answer 6

1 or more chemical species dissolve in a liquid

Question 7

A Solute is a substance that..

Answer 7

dissolved in a liquid, it can be solid, liquid or gas

Question 8

A Solvent is a ..

Answer 8

liquid in which the solute dissolves

Question 9

An electrolyte dissolves to give ____ in solution

Answer 9

Ions

Question 10

NaCl, AgNO₃, and CuSO₄·5H₂O are all…

Answer 10

Ionic compounds and water-soluble salts

Question 11

A strong electrolyte when dissolved, all the dissolved species are ions. This means

Answer 11

The dissociation reaction ‘goes to completion’

Question 12

The H2O molecule has shape…

Answer 12

Bent-2

Question 13

Equalibrium Constant in terms of concentration is represented by

Answer 13

Kc

Question 14

Do Pure solids and liquids appear in equations for Kc

Answer 14

Nope

Question 15

Are gases used for Kc calculation

Answer 15

Yup

Question 16

If Kc >1 then..

Answer 16

There are more products than reactants at equilibrium. The (Equilibrium favors the products)

Question 17

Slanted (M) refers to..

Answer 17

molarity , which is the unit of concentration in chemistry.

Question 18

Molarity is calculated from formular…

Answer 18

M = n/v

Question 19

Why is glucose considered a non-electrolyte and what holds its molecules together in a solid state

Answer 19

Is considered a non-electrolyte because it does not ionize in water and does not produce free ions to conduct electricity.
- Dissolution: Spontaneous in water due to favorable interactions between glucose molecules and water molecules.

Question 20

When reaction is going both ways we say that its..

Answer 20

At equilibrium

Question 21

Standard concentration is…

Answer 21

(1molL)^-1 sometimes written as Slanted C^0

Question 22

When Kc<1

Answer 22

There are less products than reactants at equilibrium. The (Equilibrium favors the Reactant(s))

Question 23

Melting point of water

Answer 23

0°C (32°F)

Question 24

Ice or liquid water more dense?

Answer 24

Liquid (Why Ice floats)

Question 25

Water has a relatively _____ surface tension and heat capacity

Answer 25

Large

Question 26

In liquid water, the molecules move around close to each other, continuously making and breaking hydrogen bonds with their neighbours. (True or False)

Answer 26

True

Question 27

Water is an weak/bad solvent for electrolytes when dissolved. (True or false)

Answer 27

False (Water is a great solvent for electrolytes)

Question 28

Ions, by themselves, are very high-energy species. However, solvation helps stabilise the ions. (True or false)

Answer 28

True

Question 29

Solvation involves interactions of the charged ions with the dipoles of the water molecules. All ions in water are surrounded by a number of water molecules. (True or false)

Answer 29

True

Question 30

When water is the solvent, this is called....

Answer 30

Hydration

Question 31

Water isn't a good solvent for polar molecules – ones which also have polar bonds due to large differences in electronegativity between atoms in a bond. (True or false)

Answer 31

False (its a good solvent for solids and liquids like alcohols, amines, Car acids etc.)

Question 32

Non-polar molecules such as O2(g) and N2(g) are generally not very soluble in water. (True or false)

Answer 32

True (Although solubility isnt Zero)

Question 33

Ammonia (NH3) can hydrogen-bond and is very soluble in water (True/False)

Answer 33

True

Question 34

Weak electrolytes undergo _____ dissociation in water.

Answer 34

Uncomplete

Question 35

Weak acids, such as acetic acid, are the classic examples of weak electrolytes. (True or false)

Answer 35

True