Question

writing and balancing chemical equations
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what is the formula equation for the reaction between sulfuric acid and dissolved sodium hydroxide if all products and reactants are in the aqueous or liquid phase?
hcl(aq) + naoh(aq) → nacl(s) + h₂o(l)
h₂so₄(aq) + ca(oh)₂(aq)→caso₄(aq) + 2h₂o(l)
h₂so₄(aq) + 2naoh(aq)→na₂so₄(aq) + 2h₂o(l)
2h₃po₄(aq) + 3ca(oh)₂(aq)→ca₃(po₄)(s) + 6h₂o(l)

Explanation:

Step1: Identify reactants

Reactants: sulfuric acid ($H_2SO_4(aq)$), sodium hydroxide ($NaOH(aq)$)

Step2: Determine reaction type

This is an acid-base neutralization reaction, which produces a salt and water.

Step3: Predict products

Salt: sodium sulfate ($Na_2SO_4(aq)$), water ($H_2O(l)$)

Step4: Balance the equation

Balance Na: Add coefficient 2 to $NaOH(aq)$
Balance H and O: Add coefficient 2 to $H_2O(l)$
Final balanced equation: $H_2SO_4(aq) + 2NaOH(aq)
ightarrow Na_2SO_4(aq) + 2H_2O(l)$

Answer:

$\boldsymbol{H_2SO_4(aq) + 2NaOH(aq)
ightarrow Na_2SO_4(aq) + 2H_2O(l)}$