senyawa krom yang bertindak sebagai reduktor terdapat pada reaksi ...

<p>Jawaban yang benar adalah d. Cr &nbsp; &nbsp;+ &nbsp; HNO₃ &nbsp; → &nbsp; Cr(NO₃)₃ &nbsp; + &nbsp; NO &nbsp; + &nbsp; H₂O</p><p>&nbsp;</p><p>Pembahasan</p><p>Zat reduktor adalah zat mengalami oksidasi (kenaikan bilangan oksidasi)</p><p>Untuk mengetahui perubahan biloks Cr, maka kita periksa tiap opsi jawaban&nbsp;</p><p>a. Cr₂O₇^2- &nbsp; → &nbsp; Cr³⁺ &nbsp;</p><p>&nbsp; &nbsp; &nbsp;<strong>^{+6 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; +3}</strong> &nbsp;</p><p>b. Cr₂O₃ &nbsp; → &nbsp; CrCl₃</p><p>&nbsp; &nbsp;&nbsp;<strong> ^{+3 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;+3}</strong> &nbsp;</p><p>c. Cr₂(SO₄)₃ &nbsp;→ &nbsp; CrSO₄</p><p>&nbsp; &nbsp; &nbsp;<strong>⁺³ &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;⁺²</strong> &nbsp;&nbsp;</p><p>d. Cr &nbsp; &nbsp; → &nbsp; &nbsp; &nbsp;Cr(NO₃)₃</p><p>&nbsp; &nbsp; &nbsp;<strong> ^{0 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;3+}</strong> &nbsp; &nbsp;</p><p>e. Cr₂O₇^2- &nbsp; → &nbsp; Cr³⁺ &nbsp;</p><p>&nbsp; &nbsp; &nbsp;<strong>^{+6 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; +3}</strong>&nbsp;</p><p>Dari perubahan biloks Cr tiap opsi di atas, yang mengalami kenaikan biloks adalah opsi d</p><p>&nbsp;</p><p>Maka senyawa krom yang bertindak sebagai reduktor terdapat pada reaksi d. Cr &nbsp; &nbsp;+ &nbsp; HNO₃ &nbsp; → &nbsp; Cr(NO₃)₃ &nbsp; + &nbsp; NO &nbsp; + &nbsp; H₂O</p>