{"id":215358,"date":"2025-05-16T19:16:25","date_gmt":"2025-05-16T19:16:25","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=215358"},"modified":"2025-05-16T19:16:27","modified_gmt":"2025-05-16T19:16:27","slug":"what-is-the-formula-of-the-compound-consisting-of-ironii-and-nitrite-ions","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/05\/16\/what-is-the-formula-of-the-compound-consisting-of-ironii-and-nitrite-ions\/","title":{"rendered":"What is the formula of the compound consisting of iron(II) and nitrite ions."},"content":{"rendered":"\n

What is the formula of the compound consisting of iron(II) and nitrite ions.
A. Fe2NO2
B. Fe(NO3)2
C. Fe2N
D. Fe(NO2)2
E. Fe2NO3<\/p>\n\n\n\n

The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n

The correct answer is: D. Fe(NO\u2082)\u2082<\/strong><\/p>\n\n\n\n

\n\n\n\n

Explanation:<\/strong><\/h3>\n\n\n\n

To determine the correct formula for a compound consisting of iron(II)<\/strong> and nitrite ions<\/strong>, we need to understand the charges of each ion and how to combine them to form a neutral compound<\/strong>.<\/p>\n\n\n\n

\n\n\n\n

1. Understanding the Ions Involved<\/strong><\/h3>\n\n\n\n
    \n
  • Iron(II) ion (Fe\u00b2\u207a)<\/strong>:
    The Roman numeral (II) indicates that iron has a +2 charge<\/strong>.
    So, the iron(II) ion is written as Fe\u00b2\u207a<\/strong>.<\/li>\n\n\n\n
  • Nitrite ion (NO\u2082\u207b)<\/strong>:
    The nitrite ion is a polyatomic ion<\/strong> with a -1 charge<\/strong>.
    It is written as NO\u2082\u207b<\/strong>.<\/li>\n<\/ul>\n\n\n\n
    \n\n\n\n

    2. Combining the Ions to Form a Neutral Compound<\/strong><\/h3>\n\n\n\n

    To create a neutral compound<\/strong>, the total positive and negative charges must balance.<\/p>\n\n\n\n

      \n
    • Fe\u00b2\u207a<\/strong> has a +2 charge.<\/li>\n\n\n\n
    • NO\u2082\u207b<\/strong> has a -1 charge.<\/li>\n<\/ul>\n\n\n\n

      To balance the +2 charge of one iron(II) ion, we need two nitrite ions<\/strong>: Fe2++2NO2\u2212\u2192Fe(NO2)2\\text{Fe}^{2+} + 2\\text{NO}_2^- \\rightarrow \\text{Fe(NO}_2)_2<\/p>\n\n\n\n

      Thus, the chemical formula is Fe(NO\u2082)\u2082<\/strong>.<\/p>\n\n\n\n

      \n\n\n\n

      3. Eliminating Incorrect Options<\/strong><\/h3>\n\n\n\n
        \n
      • A. Fe\u2082NO\u2082<\/strong> \u2014 Incorrect. This implies two Fe atoms and one NO\u2082 group, which does not balance the charges.<\/li>\n\n\n\n
      • B. Fe(NO\u2083)\u2082<\/strong> \u2014 Incorrect. This contains nitrate (NO\u2083\u207b), not nitrite (NO\u2082\u207b).<\/li>\n\n\n\n
      • C. Fe\u2082N<\/strong> \u2014 Incorrect. This would be a compound with nitride (N\u00b3\u207b), not nitrite.<\/li>\n\n\n\n
      • D. Fe(NO\u2082)\u2082<\/strong> \u2014 \u2705 Correct. One Fe\u00b2\u207a ion and two NO\u2082\u207b ions balance the charges.<\/li>\n\n\n\n
      • E. Fe\u2082NO\u2083<\/strong> \u2014 Incorrect. This is not a valid representation and uses nitrate instead of nitrite.<\/li>\n<\/ul>\n\n\n\n
        \n\n\n\n

        Conclusion<\/strong><\/h3>\n\n\n\n

        The correct formula for a compound made of iron(II)<\/strong> and nitrite ions<\/strong> is Fe(NO\u2082)\u2082<\/strong>, as it properly reflects the charges and number of ions needed to create a neutral ionic compound.<\/p>\n","protected":false},"excerpt":{"rendered":"

        What is the formula of the compound consisting of iron(II) and nitrite ions.A. Fe2NO2B. Fe(NO3)2C. Fe2ND. Fe(NO2)2E. Fe2NO3 The Correct Answer and Explanation is: The correct answer is: D. Fe(NO\u2082)\u2082 Explanation: To determine the correct formula for a compound consisting of iron(II) and nitrite ions, we need to understand the charges of each ion and […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[25],"tags":[],"class_list":["post-215358","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/215358","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/comments?post=215358"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/215358\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=215358"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=215358"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=215358"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}