Is Koh A Strong Electrolyte

Learning Objectives

Define strong electrolyte.
Define weak electrolyte.
Explain how to write equations for a weak electrolyte in solution.

Tin auto batteries be chancy?

Auto batteries, similar the i shown above, are used around the world to provide the ability to start car engines. 1 essential component of car batteries is the stiff electrolyte sulfuric acrid. In the bombardment, this material ionizes into hydrogen ions and sulfate ions. Every bit the battery is used, the concentrations of these ions subtract. Older batteries had openings in the top where new sulfuric acrid could be added to replenish the supply. Today, batteries are sealed to prevent leakage of the hazardous sulfuric acrid.

Potent and Weak Electrolytes

Some polar molecular compounds are nonelectrolytes when they are in their pure state, but go electrolytes when they are dissolved in water. Hydrogen chloride (HCl) is a gas in its pure molecular land and is a nonelectrolyte. However, when HCl is dissolved in h2o, it conducts a current well because the HCl molecule ionizes into hydrogen and chloride ions.

HCl(one thousand) → H⁺ (aq) + Cl ^- (aq)

When HCl is dissolved into h2o, it is called hydrochloric acid. Ionic compounds and some polar compounds are completely broken autonomously into ions and thus conduct a current very well. A strong electrolyte is a solution in which a large fraction of the dissolved solute exists as ions.

Some other polar molecular compounds go electrolytes upon being dissolved into h2o, but exercise not ionize to very neat extent. Gaseous nitrous acid ionizes in solution into hydrogen ions and nitrite ions, just does and so very weakly. Aqueous nitrous acid is composed of only about 5% ions and 95% intact nitrous acrid molecules. A weak electrolyte is a solution in which only a pocket-size fraction of the dissolved solute exists as ions. The equation showing the ionization of a weak electrolyte utilizes a double arrow indicating an equilibrium between the reactants and products.

$text{HNO}_2(g) rightleftarrows text{H}^+ (aq)+text{NO}^-_2(aq)$

Summary

A stiff electrolyte exists mainly equally ions in solution.
A weak electrolyte has only a modest amount of ionization in solution.

Practice

Use the link beneath to answer the post-obit questions:

http://www.stolaf.edu/depts/chemistry/courses/toolkits/121/js/naming/elec.htm

What is the principal species for a stiff electrolyte?
What is the principle species for a weak electrolyte?
Is KOH a strong electrolyte or a weak electrolyte?
How would you classify CaCl_ii?

Review

Is gaseous HCl an electrolyte or a nonelectrolyte?
What happens to gaseous HCl when it dissolves in water?
What is a stiff electrolyte?
What is a weak electrolyte?
Is HNO_three a stiff electrolyte or a weak electrolyte?

Glossary

strong electrolyte: A solution in which a big fraction of the dissolved solute exists as ions.
weak electrolyte: A solution in which only a small fraction of the dissolved solute exists every bit ions.

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