당량(equivalents, eq) 계산

당량(equivalents, eq) 계산

 

 

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1. How many equivalents are present in 80 grams of calcium (Ca=40)?

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80 g / (40 g/mol) = 2 mol

Ca^2+ ⇨ 1 mol Ca = 2 eq Ca

[ Ca의 당량수 = 2 eq/mol ]

2 mol × (2 eq / 1 mol) = 4 eq

 

 

2. How many equivalents of sodium are present in 116 g of NaCl (Na=23; Cl=35)?

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116 g × ( 23 / (23+35) ) = 46 g Na

46 g / (23 g/mol) = 2 mol Na

Na^+ ⇨ 1 mol Na = 1 eq Na

[ Na의 당량수 = 1 eq/mol ]

2 mol × (1 eq / 1 mol) = 2 eq

 

 

3. How many millimoles of Mg^2+ would be present in a solution containing 0.8 milliequivalents?

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Mg^2+ ⇨ 1 mol Mg = 2 eq Mg

[ Mg^2+의 당량수 = 2 eq/mol ]

0.8 meq × (1 mmol / 2 meq) = 0.4 mmol

 

 

4. How many milliequivalents of P^3- are present in a solution containing 6 millimoles?

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P^3- ⇨ 1 mol P = 3 eq P

[ P^3-의 당량수 = 3 eq/mol ]

6 mmol × (3 meq / 1 mmol) = 18 meq