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Alexxandr [17]
2 years ago
5

Write net ionic equations for gas-forming reactions. Write a net ionic equation for the reaction that occurs when solid barium c

arbonate is combined with excess aqueous hydroiodic acid.
Chemistry
1 answer:
AysviL [449]2 years ago
7 0

Answer: BaCO3(s) + 2H+(aq) --> Ba+2 + H2O(l) + CO2(g)

Explanation: Net ionic equations show only the species or atoms that participate in the reaction, in this case gas-forming

When solid barium carbonate is combined with excess aqueous hydroiodic acid the reaction that take place is.

BaCO3(s) + 2HI(aq) --> BaI2 (aq) + H2O(l) + CO2(g)

To write a ionic equation is necesary to separte the species that are dissociated in water (ag) and expresed it as ions showing the charge

BaCO3(s) + 2I-(aq) + 2H+(aq) --> Ba+2 + 2I- (aq) + H2O(l) + CO2(g)

Since I- is present in both sides of the reaction, it's eliminated in the net ionic equation, and the final expression is:

BaCO3(s) + 2H+(aq) --> Ba+2 + H2O(l) + CO2(g)

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<img src="https://tex.z-dn.net/?f=I_%7B2%7D" id="TexFormula1" title="I_{2}" alt="I_{2}" align="absmiddle" class="latex-formula">
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Answer: I2 is the Oxidant; while the 2S2O3(-2) is the reductant.

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An Oxidant is any substance that oxidizes, or receives electrons from, another; in so doing, it becomes reduced in oxidation number.

A Reductant thus exactly the opposite.

Note that the equation provided shows that Iodine (I2) received an electron to become NEGATIVELY CHARGED:

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