Guideline 2 : hydroxides of Group 1 alkali metals and Group 2 alkaline-earth metals are stong electrolytes Ba OH 2 is the exception Sodium is a Group 1 alkali metal. Determine the strength of sodium hydroxide as an electrolyte: Sodium hydroxide is a strong electrolyte because it it is the hydroxide of a Group 1 metal.
Sodium hydroxide, NaOH s , is used in drain cleaners. When added to water to form an aqueous solution we can see that it dissolves, that is, the lattice of ions is broken up so that each ion is completely surrounded by water, that is, sodium hydroxide completely dissociates in water:. Therefore there will be lots of ions in solution to conduct electricity. Therefore an aqueous solution of sodium hydroxide is a strong electrolyte.
Strong Electrolyte Definition and Examples
Since the answer we get from thinking about the dissociation of sodium hydroxide in water is the same as the answer we get using the Guidelines, we are confident our answer is correct. State your solution to the problem "is sodium hydroxide a strong or weak electrolyte": An aqueous solution of sodium hydroxide is a strong electrolyte. Question 3: Sodium chloride completely dissociates in water to form sodium ions and chloride ions. Is sodium chloride a strong electrolyte or weak electrolyte?
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Determine whether sodium chloride is a strong electrolyte or a weak electrolyte. Sodium chloride completely dissociates in water.
Define strong and weak electrolytes
Determine the strength of sodium chloride as an electrolyte: Sodium chloride is a strong electrolyte because it is a salt that dissociates completely in water. Use the guidelines to check your answer: Guideline 3 : most salts are strong electrolytes. Sodium chloride is a strong electrolyte because it is a salt that is not listed as one of the weak salts. Since the answer we got by considering the percentage dissociation of sodium chloride is the same as that we get from considering the guidelines we are confident our answer is correct. State your solution to the problem "is sodium chloride a strong or weak electrolyte": Sodium chloride is a strong electrolyte.
Is acetic acid ethanoic acid a strong electrolyte or a weak electrolyte? Determine whether acetic acid is a strong electrolyte or a weak electrolyte. If the acid dissociation constant, K a , is small, then very few of the acid's molecules dissociate ionise , that is, there will be few ions in the solution. A small dissociation constant means that there are few ions in solution to conduct electricity. Determine the strength of acetic acid as an electrolyte: Acetic acid is a weak electrolyte because its dissociation constant is small meaning there will be few ions in solution to conduct electricity.
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Since we arrived at the same answer using both the small acid dissociation constant and the Guidelines, we are confident that our answer is correct. State your solution to the problem "is acetic acid a strong or weak electrolyte": Acetic acid is a weak electrolyte.
Weak Electrolyte Definition and Examples
Examples of strong and weak electrolytes are given below:. NH 3 ammonia , C 5 H 5 N pyridine , and several more, all containing "N" Being Able to Classify Electrolytes Is Critical As chemists, we need to be able to look at a formula such as HCl or NaOH and quickly know which of these classifications it is in, because we need to be able to know what we are working with ions or compounds when we are working with chemicals. Six Steps for Categorizing Electrolytes So how do we categorize compounds based on their formula?
One practical method is outlined below:.
None of those? Call it a nonelectrolyte. Note that there are ambiguities here starting in Step 4. That's just the way it is.