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When sodium combines with water to produce sodium hydroxide and hydrogen gas, what is...

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robmel123 | Student, Grade 9 | eNotes Newbie

Posted February 19, 2009 at 9:46 AM via web

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When sodium combines with water to produce sodium hydroxide and hydrogen gas, what is the balanced equation?

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cburr | Middle School Teacher | (Level 2) Associate Educator

Posted February 19, 2009 at 9:54 AM (Answer #1)

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2Na + 2H2O = 2NaOH + H2

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atyourservice | Student, Grade 10 | (Level 3) Valedictorian

Posted September 30, 2014 at 12:59 AM (Answer #4)

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All you need to do is to break down the problem one by one, this will help you a lot.

sodium = Na

combines= +

with water = H2O OR H+OH-

to produce = --->

sodium = Na

hydroxide = OH

hydrogen gas = H(g)

Na + H+OH- ---> NaOH + H2(g)

now all you balance out the equation: 

2Na + 2H+OH- ---> 2NaOH + H2(g)

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jillyfish | Student, Undergraduate | (Level 1) Valedictorian

Posted February 19, 2009 at 7:25 PM (Answer #3)

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Hydrogen molecules are diatomic. In its normal state, two hydrogen atoms bond to form a hydrogen molecule, H2.

So...

Na + H2O = NaOH + H would not work because H is not the product of the reaction.

You need

2Na + 2H2O = 2NaOH + H2

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