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
JulsSmile [24]
4 years ago
14

As the weak acid (HA) is titrated with a strong base (OH−), the neutralization reaction is:

Chemistry
1 answer:
andrey2020 [161]4 years ago
8 0

Answer:

a) [HA] = 0.012 M; [A-] = 4 E-3 M

b) pH = 3.47

Explanation:

neutralization reaction:

  • HA + OH- → A- + H2O

∴ mol HA = 0.0015 mol

∴ mol A- = 0.0005 mol

∴ Vsln = 125 mL = 0.125 L

a) approx. concentration:

⇒ [HA] = 0.0015 mol / 0.125 L = 0.012 mol/L

⇒ [A-] = 0.0005 mol / 0.125 L = 4 E-3 mol/L

b) pH = ?

∴ pKa = 3.90 = - Log Ka

⇒ Ka = 1.26 E-4 = ([H3O+]*( 4 E-3 + [H3O+])) / (0.012 - [H3O+])

⇒ 1.512 E-6 - 1.26 E-4[H3O+] = 4 E-3[H3O+] + [H3O+]²

⇒ [H3O+]² + 4.126 E-3[H3O+] - 1.512 E-6 = 0

⇒ [H3O+] = 3.3866 E-4 M

⇒ pH = 3.4702

You might be interested in
Explain how venus rotation is different from earths
saul85 [17]
It has the slowest rotation of all planets. 

like 240 earth days...in retrograde clockwise turns
7 0
3 years ago
Read 2 more answers
Identify the correct net ionic equation for the reaction that occurs when solutions of Pb(NO3)2 and NH4Cl are mixed.
Pie

Answer:

Pb2+(aq) + 2Cl–(aq) ----> PbCl2(s)

Explanation:

The net ionic equation shows the main reaction that takes place in a system. Hence, a net ionic equation focusses only on those species that actually participate in the reaction.

For the reaction between Pb(NO3)2 and NH4Cl , the net ionic equation is;

Pb^+(aq) + 2Cl^-(aq) ---> PbCl2(s)

7 0
3 years ago
Give the number of significant figures indicated 78
Mama L [17]

2 significant figures

6 0
3 years ago
Adding O2 to the reaction 6CO2 + 6H2O <---> C6H12O6 + 6O2, WHICH WAY WILL THE REACTION SHIFT?
Alex73 [517]

Increase in Oxygen shift the equilibrium towards reactant side.

<u>Explanation:</u>

6CO₂ + 6H₂O ⇄ C₆H₁₂O₆ + 6O₂

This is the reaction occurs in the photosynthesis of plants by means of sunlight. In this case, if the concentration of Oxygen increases or adding more oxygen to the product side will shift the equilibrium towards the reactant side according to the Le Chatlier's principle, which adjusts the equilibrium by itself for any changes that is increase or decrease in pressure, temperature or concentration of reactants or products.

5 0
3 years ago
The p-value of a statistical test depends on all of the following, except:
vaieri [72.5K]

Answer:

The correct option is e.

Explanation:

p-value is the probability value for a given statistical model, the probability that, when the null hypothesis is true.

For two two samples the formula of test statistics is

t=\frac{(\overline{x}_1-\overline{x}_2)-(\mu_1-\mu_2)}{\sqrt{\frac{s_1^2}{n_1}+\frac{s_2^2}{n_2}}}

where,

\overline{x} is sample mean

\mu is population mean.

s is standard deviation.

n is sample size.

Variance is the square of standard deviation.

It means variance, mean, numbers of samples is used in calculation of p-value.

Degree of freedom define the shape of the t-distribution that your t-test uses to calculate the p-value.

d.f.=n_1+n_2-2

p-value of a statistical test depends on all of the following, except median.

Therefore the correct option is e.

4 0
3 years ago
Other questions:
  • How is the chemical composition of carbon monoxide,CO,similar to that of carbon dioxide,CO2?how is it different?
    10·1 answer
  • A) What is the mass in grams of a sample of manganese (II) phosphite containing 7.23 x 10^22 phosphite ions?
    7·1 answer
  • _______ is the current condition in the troposphere. (2 points)
    14·1 answer
  • PLEASE HELP ME
    10·1 answer
  • Water can be formed in the following reaction:
    7·1 answer
  • BRAINLIESTTT ASAP!!! PLEASE HELP ME :)
    8·2 answers
  • Write balanced equations for each of the processes, choosing from the following substances as reactants: BaCl2 O2 H2SO4 HNO3 C2H
    5·1 answer
  • PLEASE HELP ME. REAL ANSWERS ONLY PLZ
    10·1 answer
  • During convention _______, less dense fluid rises and _______, denser fluid sinks
    7·1 answer
  • Which electron transition is accompanied by
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!