All categories

3 years ago

Select all that apply.

2 answers:

3 0

Consider this system: CH3COOH(aq) H+(aq) + CH3COO- Ka = 1.8 x 10-5
The equilibrium as OH- ions are added;

A) H+ will combine with OH- to form water. 

C) The acid will dissociate to supply more H+. 
D) The reaction will move to the right.

Scrat [10]3 years ago

3 0

Answer : The correct options are, (A), (C) and (D)

Explanation :

Le-Chatelier's principle : It states that if any change in the variables of the reaction, then the equilibrium will shift in that direction where the effect will be minimum.

The balanced equilibrium reaction will be,

$CH_3COOH(aq)\rightleftharpoons H^+(aq)+CH_3COO^-$

As the concentration of $H^+$ are decreased, the equilibrium will shift in a direction where concentration of $H^+$ is increasing and thus the dissociation of acid will increase to supply more of $H^$ ions. During this process the reaction will move to the right direction.

In the given equilibrium reaction when the $OH^-$ are added then the $H^+$ ion will combine with $OH^-$ ion to form water.

Hence, the correct options are, (A), (C) and (D)

You might be interested in

What color is the 2,6-dichloroindophenol solution in acidic solutions?

ICE Princess25 [194]

DCPIP is a redox dye that starts off blue but will turn reddish-pink in acidic solution.

This chemical is often used in general chemistry experiments with vitamin C (ascorbic acid), which is a good reducing agent. The DCPIP become colorless when it is reduced (remember, it's blue when oxidized).

7 0

3 years ago

Describe how spead, velocity and brcoloration are related.

Flura [38]

Answer:

Speed, being a scalar quantity, is the rate at which an object covers distance. The average speed is the distance (a scalar quantity) per time ratio. On the other hand, velocity is a vector quantity; it is direction-aware. Velocity is the rate at which the position changes.

3 0

3 years ago

What is 694,563,239 rounded to the nearest thousand

lina2011 [118]

694,563,239 rounded to the nearest thousand is 694,563.

It's because the first digit from the right is for ones, second for tens, third for hundreds and fourth for thousands and that's the one that we should take a closer look at. You can round it either to 3 or 4, depends on the digit of hundreds. In this case 3239 is clearly closer to 3000 than 4000, that's why we round it to 694,563, not 694,564.

6 0

3 years ago

Read 2 more answers

Mosquitoes lays eggs that must hatch in water. The young, called larvae live their first few days in water

nevsk [136]

Answer:

Explanation:

I believe he is C

3 0

3 years ago

In the Haber process for ammonia synthesis, K " 0.036 for N 2 (g) ! 3 H 2 (g) ∆ 2 NH 3 (g) at 500. K. If a 2.0-L reactor is char

lisabon 2012 [21]

Answer : The partial pressure of $N_2,H_2\text{ and }NH_3$ at equilibrium are, 1.133, 2.009, 0.574 bar respectively. The total pressure at equilibrium is, 3.716 bar

Solution : Given,

Initial pressure of $N_2$ = 1.42 bar

Initial pressure of $H_2$ = 2.87 bar

$K_p$ = 0.036

The given equilibrium reaction is,

$N_2(g)+H_2(g)\rightleftharpoons 2NH_3(g)$

Initially 1.42 2.87 0

At equilibrium (1.42-x) (2.87-3x) 2x

The expression of $K_p$ will be,

$K_p=\frac{(p_{NH_3})^2}{(p_{N_2})(p_{H_2})^3}$

Now put all the values of partial pressure, we get

$0.036=\frac{(2x)^2}{(1.42-x)\times (2.87-3x)^3}$

By solving the term x, we get

$x=0.287\text{ and }3.889$

From the values of 'x' we conclude that, x = 3.889 can not more than initial partial pressures. So, the value of 'x' which is equal to 3.889 is not consider.

Thus, the partial pressure of $NH_3$ at equilibrium = 2x = 2 × 0.287 = 0.574 bar

The partial pressure of $N_2$ at equilibrium = (1.42-x) = (1.42-0.287) = 1.133 bar

The partial pressure of $H_2$ at equilibrium = (2.87-3x) = [2.87-3(0.287)] = 2.009 bar

The total pressure at equilibrium = Partial pressure of $N_2$ + Partial pressure of $H_2$ + Partial pressure of $NH_3$

The total pressure at equilibrium = 1.133 + 2.009 + 0.574 = 3.716 bar

6 0

3 years ago