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miv72 [106K]
2 years ago
10

Which of the following is a strong base? a. h2o b. NH3 c.CaCo3 d. NaOh

Chemistry
1 answer:
hichkok12 [17]2 years ago
4 0

Answer:

d. naoh

Explanation:

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What is the ph of a 4.8 m pyridine solution that has kb = 1.9 × 10-9? the equation for the dissociation of pyridine is?
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Answer: 9.98


Explanation:


1) The equation for the dissociation of pyridine is:


C₅H₅N₅(aq )+ H₂O(l) ⇄ C₅H₅NH⁺(aq) + OH⁻(aq)


2) Kb equation:


Kb = [C₅H₅NH⁺(aq)] [OH⁻(aq)] / [C₅H₅N₅(aq )]


Where:


[C₅H₅NH⁺(aq)] = [OH⁻(aq)] ← from the equilibrium reaction


[C₅H₅N₅(aq )] = 4.8 M ← from the statement


⇒ 1.9 × 10 ⁻⁹ = x² / 4.8 ⇒ x² = 9.12 × 10⁻⁹


⇒ x = 9.55 × 10⁻⁵ = [OH⁻(aq)]


3) pOH


pOH = - log [OH⁻(aq)] = 4.02


4) pOH + pH = 14


⇒ pH = 14 - 4.02 = 9.98

4 0
2 years ago
Read 2 more answers
ASAP HELP PLZZZZ
coldgirl [10]

Answer:

1) in excess

Explanation:

Copper oxide is insoluble in water, while acid is soluble in water

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2 years ago
What is reacitivty series, and how you can access reactivity of metals...
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In Chemistry, a reactivity series of metals , also known as the activity series refers to the arrangement of metals in the descending order based upon their reactivity .

<u>Salient Features</u> :-

  • The metal at the top of the reactivity series are powerful reducing agents since they are easily oxidized.
  • The reducing ability of metals grows weaker while traversing down the series.
  • The electro-positivity of metals also reduces while moving down the reactivity series.
  • Metals that are placed higher on the reactivity series have the ability to displace metals that are placed lower in the series.

<u>The metal reactivity series is given below</u> :-

To access the reactivity of metal , from the given reactivity series identify any of the metal and locate the reactivity based upon the choice of reactivity. The metal at the top (Potassium) is most reactive and the metal at the bottom (Platinum) is the least reactive.

To learn more about metal reactivity series visit -

brainly.com/question/16072297

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2 years ago
Neutralization is a process that occurs whenever an acid reacts with a base in the mole ratios specified by the balanced equatio
labwork [276]
The factors that can determine the outcome of a "neutralization reaction" include:
__________________________________________________________
1) temperature; 

2) concentration (of the solution); 

3) type of acid used;

4) type of alkali used;

5) type of reaction; 
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3 years ago
Which of the following best describes the bonding found within Al2O3?
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Answer:

C). Electrostatic attractions between + and - charged ions.

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