1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
irina [24]
3 years ago
9

What is the pH of a 75.0 mL solution that is 0.045 M in weak base and 0.053 M in the conjugate weak acid

Chemistry
1 answer:
noname [10]3 years ago
3 0

Answer:

7.07

Explanation:

HA = weak acid = 0.053

A+ = conjugate base = 0.045

Ka = 7.2x10^-8

Ka = [H+][A-]/HA

7 2x10^-8 = [H+][0.045]/0.053

[H+] = 7.2x10^-8 x 0.053/0.045

= 8.48x10^-8

PH = -log[H+]

= -log[8.48x10^-8]

PH = -[login.48 + log10^-8]

PH = -0.928 - (-8)log10

= 7.07

You might be interested in
Name the process which takes place when
Lady_Fox [76]

Explanation:

Chlorine gas bleaches the damp litmus (red or blue). Bleaching is an oxidation process.

5 0
3 years ago
Read 2 more answers
In your own words what is equilibrium?
fenix001 [56]

Answer:

when the forward and reverse reactions occur at equal rates.

chemical reaction is in equilibrium when the concentrations of reactants and products are constant - their ratio does not vary.

8 0
3 years ago
Example of physical property
alisha [4.7K]

Answer:

Color. I thinkkk.

5 0
3 years ago
Read 2 more answers
Which balanced equation represents a redox reaction? a. AgNO3(aq) +NaCl(aq) →AgCl(s) +NaNO3(aq) b. H2CO3(aq) →H2O() + CO2(g) c.
Aleks [24]

Answer : The correct option is, (D) Mg(s)+2HCl(aq)\rightarrow MgCl_2(s)+H_2(g)

Explanation :

(A) AgNO_3(aq)+NaCl(aq)\rightarrow AgCl(s)+NaNO_3(aq)

This reaction is a double displacement reaction in which the cation and anion of two reactants are exchange their places to give two different products.

(B) H_2CO_3(aq)\rightarrow H_2O(l)+CO_2(g)

This reaction is a decomposition reaction in which the larger molecule decomposes to give two or more products.

(C) NaOH(aq)+HCl(aq)\rightarrow NaCl(s)+H_2O(aq)

This reaction is a neutralization reaction in which an acid and a base react to give a salt and water as a product.

(D) Mg(s)+2HCl(aq)\rightarrow MgCl_2(s)+H_2(g)

This reaction is a redox reaction in which the oxidation and reduction reaction occur simultaneously.

Oxidation reaction is the reaction in which a substance looses its electrons. In this oxidation state increases.

Reduction reaction is the reaction in which a substance gains electrons. In this oxidation state decreases.

In this reaction, magnesium shows oxidation due to change in oxidation number from (0) to (+2) and hydrogen shows reduction due to change in oxidation number from (-1) to (0).

Hence, the correct option is, (D)

7 0
3 years ago
According to South Erie, all sales carry out the function needed to sustain life. That means all sales must contain one accordin
soldier1979 [14.2K]

Cell theory states that all the living organisms are made up of basic structural and functional units, cells. All cells divide and give rise to new cells. All the cells have similar chemical composition. The nuclei acid DNA present in the chromosomes helps in carrying hereditary information from generation to generation. So, in order to sustain life the cells must contain DNA either enclosed in the nucleus or freely floating in the cytoplasm.

4 0
3 years ago
Other questions:
  • Where is the location of the non-metals on the periodic table​
    9·2 answers
  • Balance the following redox reaction if it occurs in H2SO4. What are the coefficients in front of C3H8O2 and H2SO4 in the balanc
    15·1 answer
  • Why is global warming called the greenhouse effect?
    14·1 answer
  • What pressure will be exerted by 26g if CO2 at a temperature of 35C and a volume of 550ml?
    8·1 answer
  • A hydrate of iron (ii) sulfite is known to contain 44.26% mater. what is the correct name of the hydrate
    14·1 answer
  • An acidic solution could have a pH of
    13·1 answer
  • 1 dozen apples=2.0kg whats the mass of 7 red apples
    6·1 answer
  • Pick a key concept that you understand well and explain it in a way that an elementary school student could understand.
    10·1 answer
  • How old were you when u got your first kiss? if you still haven't gotten it how old are you now?
    13·2 answers
  • Please Help Will Mark Brainliest!!!
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!