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iragen [17]
3 years ago
12

Is the chemical equation balanced? Zn + 2HCl → ZnCl2 + H2 no, or yes

Chemistry
1 answer:
tamaranim1 [39]3 years ago
3 0

Answer:

Yes.

General Formulas and Concepts:

<u>Chemistry - Stoichiometry</u>

  • Balancing reactions
  • Reaction prediction

Explanation:

<u>Step 1: RxN</u>

Zn + HCl → ZnCl₂ + H₂

<u>Step 2: Balance RxN</u>

Zn + 2HCl → ZnCl₂ + H₂

  • Need 2 H's on both sides
  • Need equal amount of Cl's on both sides
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If 842 grams of sodium hydroxide reacts with 750.0 grams of aluminum, how many grams of aluminum hydroxide should theoretically
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548.55 grams of aluminum hydroxide should theoretically form.

Explanation:

Balanced equation for the reaction:

3 NaOH + Al ⇒ Al(OH)3 +3 Na

DATA GIVEN:

mass of NaOH = 842 grams, atomic mass =39.9 grams/mole

mass of Al = 750 grams, atomic mass = 26.9 grams/mole

aluminum hydroxide theoretical yield = ?

Moles of NaOH reacted

number of moles = \frac{mass}{atomic mass of 1 mole}

putting the values in the equation

NaOH = \frac{842}{39.9}

           = 21.1 MOLES OF NaOH

Al = \frac{750}{26.9}

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from the equation

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21.1 moles of NaOH will react to give x moles of Al(OH)3

\frac{1}{3} = \frac{x}{21.1}

7.03 moles of Al(OH)3 is formed.

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1 mole of Al(OH)3 is formed from 1 mole of Al in the reaction

so, 27.8 Moles will react to give give 27.8 moles of Al(OH)3 limiting reagent of the given reaction is NaOH

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theoretical  yield from the given data is 548.55 grams

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3 years ago
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