|Electrolytes are substances which, as soon as dissolved in water, break up intocations (plus-charged ions) and also anions (minus-charged ions). We say they ionize.|
You are watching: Which of the following is not a strong electrolyte?
Strong electrolytes ionize entirely (100%), while weak electrolytesionize just partly (normally on the order of 110%). That is, the primary speciesin solution for strong electrolytes are ions, while the primary specie in solution for weak electrolytes is the un-ionized compound itself.Strong electrolytes fall right into 3 categories: strong acids,solid bases, and also salts. (Salts are sometimes likewise referred to as ionic compounds, but really strongbases are ionic compounds too.) The weak electrolytes incorporate weak acids and weak bases.Instances of strong and weak electrolytes are provided below:
|Strong Electrolytes||strong acids||HCl, HBr, HI, HNO3, HClO3, HClO4, and H2SO4||solid bases||NaOH, KOH, LiOH, Ba(OH)2, and Ca(OH)2||salts||NaCl, KBr, MgCl2, and also many, many more||Weak Electrolytes||weak acids||HF, HC2H3O2 (acetic acid), H2CO3 (carbonic acid), H3PO4 (phosphoric acid), and also many type of even more||weak bases||NH3 (ammonia), C5H5N (pyridine), and also several more, all containing "N"|
Being Able to Classify Electrolytes Is CriticalAs chemists, we need to be able to look at a formula such as HCl or NaOH and also quickly knowwhich of these classifications it is in, because we must be able torecognize what we are functioning through (ions or compounds) when we are working withchemicals. We need to know, for example, that a bottle labeled "NaCN" (a salt) really containsno NaCN, rather Na+ and CN, or that a bottle labeled "HCN" (a weak acid) is principally HCNthrough a small amount of H+ and also CN likewise current. The distinction in between simply opening a bottle labeled "HCN" and one labeled "NaCN" might be your life, as HCN, or hydrogen cyanide, is a toxic gas, while CN, or cyanide ion, being an ion, isn"t a gas and also is only transfered in solid or solution create. Nonetheless, it is cyanide ion, CN, that is the killer. (It locks onto the Fe3+ in hemoglobin, resulting in much less oxygen to acquire to your brain.) Cyanide is existing in both bottles, and also if it is transfered to your bloodstream either as CN or as HCN, it will kill you.
Six Steps for Categorizing ElectrolytesSo exactly how execute we categorize compounds based on their formula? One practical method is outlined below:
|Step 1||Is it one of the salso solid acids?||Step 2||Is it of the create Metal(OH)n? Then it"s a solid base.||Step 3||Is it of the develop Metal(X)n? Then it"s a salt.||Step 4||Does it"s formula begin with "H"? It"s probably a weak acid.||Step 5||Does it have actually a nitrogen atom? It may be a weak base.|
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|Tip 6||None of those? Call it a nonelectrolyte.|