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igor_vitrenko [27]
2 years ago
13

Which of there is an indication that a chemical reaction has occurred?

Chemistry
1 answer:
Komok [63]2 years ago
6 0
Answer is (b) , because a chemical change happened
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21 mL It required 42.35 mL of H2SO4 to neutralize 21.17 mL of 0.5000 M NaOH. Calculate the concentration of H2SO4
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The balanced equation for the above reaction is 
2NaOH + H₂SO₄ ---> Na₂SO₄ + 2H₂O
stoichiometry of NaOH to H₂SO₄ is 2:1
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According to stoichiometry, acid moles required are 1/2 of the base moles reacted
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Number of moles in 42.35 mL of H₂SO₄ - 0.010585 /2 mol
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