CHEM: CHEMICAL EQUILIBRIUM

Question 1

The term refers to what we might call a “balance of forces”

Answer 1

EQUILIBRIUM

Question 2

• Balance of chemicals, forces, reactants, and
  products involved

Answer 2

EQUILIBRIUM

Question 3

(t or f)

Chemical equilibrium occurs when a reaction and its reverse reaction proceed at the same rate
- Hindi lagging forward reaction, pwede ring
backwards

Answer 3

true

Question 4

(t or f)

Not always reactants to products, but it can also be products to reactants
- Where it will go depends on the different
forces, different factors affecting the
equilibrium

Answer 4

true

Question 5

(t or f)

• Where your arrow is pointing at, that is your
  product
• Wherever your arrow is coming from, that is
  your reactant

Answer 5

true

Question 6

when there is no tendency for the quantities of reactants and products to change

Answer 6

chemical reaction is in equilibrium

Question 7

(t or f)

The direction in which we write a chemical reaction is arbitrary
• Thus, the two equations represent the same
chemical reaction system In which the roles of the components are reversed and both yield the same mixture of components when the change is completed

Answer 7

true

Question 8

means creating

Answer 8

synthesis

Question 9

means decomposing (from compounds to elements)

Answer 9

dissociation

Question 10

(t or f)

• As a system approaches equilibrium, both the
forward and reverse reactions are occurring
• At equilibrium, the forward and reverse reactions are proceeding at the same rate (kung mabilis si forward, dapat mabilis din magreverse; balanced)

Answer 10

true

Question 11

( t or f)

Once equilibrium is achieved, the amount of each reactant and product remains constant

Answer 11

true

Question 12

both the forward and
reverse reactions are being carried out; as a result, we write its equation with a double arrow
- Lagging double arrow ang equilibrium (balance)

Answer 12

system at equilibrium

Question 13

Is the state in which the chemical activities or
concentrations of the reactants and products have no net change over time
• Usually, this would be the state that results when the forward chemical process proceeds at the same rate as their reverse reaction

Answer 13

CHEMICAL EQUILIBRIUM

Question 14

The reaction rates of the forward and reverse
reactions are generally not zero but, being equal, there are no net changes in any of the reactant or product concentrations. This process is called____________

Answer 14

dynamic equilibrium

Question 15

Stem from the research by ______________

Answer 15

Cato Guldberg and Peter Waage

Question 16

(t or f) the 2 aspects of the Law of Mass Action
1. The equilibrium aspect, concerning the
composition of a reaction mixture at
equilibrium
2. The kinetic aspect concerning the rate
equations for elementary reactions

Answer 16

true

Question 17

is a dynamic process in which
rates of reaction for the forward and backward
reactions must be equal

Answer 17

Chemical equilibrium

Question 18

small letters are use to balance the equations [will be the superscript in your expression]

Answer 18

coefficients

Question 19

liquid but have charges

Answer 19

Aqueous

Question 20

formula of Chemical equilibrium

Answer 20

= products/reactants

Question 21

Gas-phase reactions that use units of partial
pressure

Answer 21

Kp

Question 22

Dissociation of water: dissociation constant of
water:

Answer 22

Kw

Question 23

Dissociation of acids: acid dissociation constant:

Answer 23

Ka

Question 24

Reaction fo bases with water: base dissociation
constant:

Answer 24

Kb

Question 25

Solubility of precipitates: solubility product:

Answer 25

Ksp

Question 26

the reaction is product-favored; product
predominates at equilibrium
- Mas Malaki yung product

Answer 26

K&raquo_space; 1

Question 27

the reaction is reactant-favored; reactant
predominates at equilibrium
- Mas Malaki ‘yung reactant

Answer 27

K &laquo_space;1

Question 28

(t or f)

Malalaman na initial amount sa mga key words
like “At first”
,
“Initially”

Answer 28

true

Question 29

Is a quantitative measure of the extent of reaction, the relative proportion of products and reactants present in the reaction mixture at some instant of time

Answer 29

REACTION QUOTIENT (Q)

Question 30

(t or f)

To calculate Q, one substitutes the initial
concentrations on reactants and products into the equilibrium expression
• Q gives the same ratio the equilibrium expression gives, but for a system that is not at equilibrium

Answer 30

true

Question 31

• If a system at equilibrium is disturbed by a change in temperature, pressure, or the concentration of one of the components, the system will shift its equilibrium position so as to counteract the effect of the disturbance

Answer 31

LE CHATELIER’S PRINCIPLE