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7 June, 00:08

Aqueous calcium bromide was mixed with aqueous gold (i perchlorate, and a crystallized gold (i bromide product was formed. consider the other product and its phase, and then write the balanced molecular equation for this precipitation reaction.

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  1. 7 June, 00:37
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    Calcium bromide is CaBr2

    Gold (I) perchlorate is AuClO4

    Crystallized gold (I) bromide would be AuBr (s). beginning with those, your equation would be:

    CaBr2 (aq) + AuClO4 (aq) - - > AuBr (s)

    Now, the other product would be calcium perchlorate that would remain soluble. Since perchlorate has a - 1 charge, you will need 2 of that ion to balance a calcium ion. Also, since you have 2 Br - ions on the left, you will need 2 AuBr (s) on the right. All of that leads to:

    CaBr2 (aq) + 2 AuClO4 (aq) - - > 2 AuBr (s) + Ca (ClO4) 2 (aq)
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