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Answer :
Final answer:
The balanced equation for the reaction between Sr(NO2)2 and HCl is Sr(NO2)2 (aq) + 2 HCl (aq)
ightarrow SrCl2 (aq) + 2 HNO2 (aq). The correct option is b) after correcting the product HNO3 to HNO2, which should be nitrous acid.
Explanation:
To balance the equation Sr(NO2)2 (aq) + HCl (aq)
→ SrCl2 (aq) + HNO2 (aq), we must ensure that there are equal numbers of each type of atom on both sides of the equation. Let's inspect the original unbalanced equation:
Sr(NO2)2 (aq) + HCl (aq)
→ SrCl2 (aq) + HNO2 (aq)
When we look at this equation, we can see that we have two nitrites (NO2-) on the left but only one nitrous acid (HNO2) on the right. Also, we have one chloride ion (Cl-) on the left but two chloride ions in the strontium chloride formula on the right. To balance this, we need 2 moles of HCl for every mole of Sr(NO2)2 to produce 2 moles of HNO2 and maintain the chloride balance. Therefore, the balanced equation is:
Sr(NO2)2 (aq) + 2 HCl (aq) → SrCl2 (aq) + 2 HNO2 (aq)
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