{"id":35388,"date":"2025-06-24T10:08:46","date_gmt":"2025-06-24T10:08:46","guid":{"rendered":"https:\/\/gaviki.com\/blog\/?p=35388"},"modified":"2025-06-24T10:08:48","modified_gmt":"2025-06-24T10:08:48","slug":"ionic-compounds-with-polyatomic-ions","status":"publish","type":"post","link":"https:\/\/gaviki.com\/blog\/ionic-compounds-with-polyatomic-ions\/","title":{"rendered":"Ionic Compounds with Polyatomic Ions"},"content":{"rendered":"\n<p>Ionic Compounds with Polyatomic Ions 1. Physical properties Compound K2CO3; Appearance: White, solid, crystalline Density: 2.29 g\/cm\u00c2\u00b3 Melting Point: 891\u00c2\u00b0C Formulas of ionic compounds: Name: Potassium carbonate Positive Ion: K1+ Negative Ion: CO3 Formula: K2CO3 Name: Sodium nitrate Positive Ion: Na1+ Negative Ion: NO3 Formula: NaNO3 Name: Calcium bicarbonate Positive Ion: Ca2+ Negative Ion: HCO3 Formula: Ca(HCO3)2 Name: Chromium (III) hydroxide Positive Ion: Cr3+ Negative Ion: OH1- Formula: Cr(OH)3 Name: Lithium phosphate Positive Ion: Li1+ Negative Ion: PO4 Formula: Li3PO4 Name: Potassium sulfate Positive Ion: K1+ Negative Ion: SO4 Formula: K2SO4 Names of ionic compounds: Formula: CaSO4 Positive Ion: Ca2+ Negative Ion: SO4 Name: Calcium sulfate Formula: Al(NO3)3 Positive Ion: Al3+ Negative Ion: NO3 Name: Aluminum nitrate Formula: Na2CO3 Positive Ion: Na1+ Negative Ion: CO3 Name: Sodium carbonate Formula: MgSO3 Positive Ion: Mg2+ Negative Ion: SO3 Name: Magnesium sulfite Formula: Cu(OH)2 Positive Ion: Cu2+ Negative Ion: OH1- Name: Copper(II) hydroxide Formula: Mg3(PO4)2 Positive Ion: Mg2+ Negative Ion: PO4 Name: Magnesium phosphate Molecular Compounds 1. Physical properties Compound: Water; H2O Appearance: Colorless; liquid Density: 1.0 g\/mL Melting Point: 0\u00c2\u00b0C Formulas of molecular compounds: Name: Dinitrogen pentoxide Formula: N2O5 Name: Silicon tetrachloride Formula: SiCl4 Name: Dinitrogen trisulfide Formula: N2S3 Name: Oxygen difluoride Formula: OF2 Name: Iodine heptafluoride Formula: IF7 Name: Phosphorus tribromide Formula: PBr3<\/p>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n<p><strong>Correct Answers Summary<\/strong><\/p>\n\n\n\n<p><strong>Ionic Compounds with Polyatomic Ions:<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Potassium carbonate<\/strong>\n<ul class=\"wp-block-list\">\n<li>Positive Ion: K\u207a<\/li>\n\n\n\n<li>Negative Ion: CO\u2083\u00b2\u207b<\/li>\n\n\n\n<li>Formula: K\u2082CO\u2083<\/li>\n\n\n\n<li>Appearance: White, solid, crystalline<\/li>\n\n\n\n<li>Density: 2.29 g\/cm\u00b3<\/li>\n\n\n\n<li>Melting Point: 891\u00b0C<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Sodium nitrate<\/strong>\n<ul class=\"wp-block-list\">\n<li>Positive Ion: Na\u207a<\/li>\n\n\n\n<li>Negative Ion: NO\u2083\u207b<\/li>\n\n\n\n<li>Formula: NaNO\u2083<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Calcium bicarbonate<\/strong>\n<ul class=\"wp-block-list\">\n<li>Positive Ion: Ca\u00b2\u207a<\/li>\n\n\n\n<li>Negative Ion: HCO\u2083\u207b<\/li>\n\n\n\n<li>Formula: Ca(HCO\u2083)\u2082<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Chromium(III) hydroxide<\/strong>\n<ul class=\"wp-block-list\">\n<li>Positive Ion: Cr\u00b3\u207a<\/li>\n\n\n\n<li>Negative Ion: OH\u207b<\/li>\n\n\n\n<li>Formula: Cr(OH)\u2083<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Lithium phosphate<\/strong>\n<ul class=\"wp-block-list\">\n<li>Positive Ion: Li\u207a<\/li>\n\n\n\n<li>Negative Ion: PO\u2084\u00b3\u207b<\/li>\n\n\n\n<li>Formula: Li\u2083PO\u2084<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Potassium sulfate<\/strong>\n<ul class=\"wp-block-list\">\n<li>Positive Ion: K\u207a<\/li>\n\n\n\n<li>Negative Ion: SO\u2084\u00b2\u207b<\/li>\n\n\n\n<li>Formula: K\u2082SO\u2084<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<p><strong>Additional Names from Formulas:<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>CaSO\u2084<\/strong>\n<ul class=\"wp-block-list\">\n<li>Positive Ion: Ca\u00b2\u207a<\/li>\n\n\n\n<li>Negative Ion: SO\u2084\u00b2\u207b<\/li>\n\n\n\n<li>Name: Calcium sulfate<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Al(NO\u2083)\u2083<\/strong>\n<ul class=\"wp-block-list\">\n<li>Positive Ion: Al\u00b3\u207a<\/li>\n\n\n\n<li>Negative Ion: NO\u2083\u207b<\/li>\n\n\n\n<li>Name: Aluminum nitrate<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Na\u2082CO\u2083<\/strong>\n<ul class=\"wp-block-list\">\n<li>Positive Ion: Na\u207a<\/li>\n\n\n\n<li>Negative Ion: CO\u2083\u00b2\u207b<\/li>\n\n\n\n<li>Name: Sodium carbonate<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>MgSO\u2083<\/strong>\n<ul class=\"wp-block-list\">\n<li>Positive Ion: Mg\u00b2\u207a<\/li>\n\n\n\n<li>Negative Ion: SO\u2083\u00b2\u207b<\/li>\n\n\n\n<li>Name: Magnesium sulfite<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Cu(OH)\u2082<\/strong>\n<ul class=\"wp-block-list\">\n<li>Positive Ion: Cu\u00b2\u207a<\/li>\n\n\n\n<li>Negative Ion: OH\u207b<\/li>\n\n\n\n<li>Name: Copper(II) hydroxide<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Mg\u2083(PO\u2084)\u2082<\/strong>\n<ul class=\"wp-block-list\">\n<li>Positive Ion: Mg\u00b2\u207a<\/li>\n\n\n\n<li>Negative Ion: PO\u2084\u00b3\u207b<\/li>\n\n\n\n<li>Name: Magnesium phosphate<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<p><strong>Molecular Compounds:<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Water<\/strong> \u2013 H\u2082O\n<ul class=\"wp-block-list\">\n<li>Appearance: Colorless liquid<\/li>\n\n\n\n<li>Density: 1.0 g\/mL<\/li>\n\n\n\n<li>Melting Point: 0\u00b0C<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<p><strong>Formulas of Molecular Compounds:<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Dinitrogen pentoxide \u2013 N\u2082O\u2085<\/li>\n\n\n\n<li>Silicon tetrachloride \u2013 SiCl\u2084<\/li>\n\n\n\n<li>Dinitrogen trisulfide \u2013 N\u2082S\u2083<\/li>\n\n\n\n<li>Oxygen difluoride \u2013 OF\u2082<\/li>\n\n\n\n<li>Iodine heptafluoride \u2013 IF\u2087<\/li>\n\n\n\n<li>Phosphorus tribromide \u2013 PBr\u2083<\/li>\n<\/ol>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p><strong>Explanation <\/strong><\/p>\n\n\n\n<p>Ionic and molecular compounds differ significantly in their bonding and physical properties. Ionic compounds consist of metals bonded to nonmetals or polyatomic ions. These compounds form crystalline solids due to the strong electrostatic attraction between oppositely charged ions. For example, potassium carbonate (K\u2082CO\u2083) is composed of potassium ions (K\u207a) and carbonate ions (CO\u2083\u00b2\u207b), forming a stable, solid lattice with high melting points and considerable density. Many ionic compounds, such as calcium sulfate (CaSO\u2084) and sodium nitrate (NaNO\u2083), dissolve in water and conduct electricity in solution due to the presence of free ions.<\/p>\n\n\n\n<p>Polyatomic ions like NO\u2083\u207b (nitrate), SO\u2084\u00b2\u207b (sulfate), and PO\u2084\u00b3\u207b (phosphate) are groups of covalently bonded atoms that carry a net charge. These ions act as a single unit when forming ionic compounds. The correct formula must balance the total positive and negative charges. For instance, in lithium phosphate (Li\u2083PO\u2084), three lithium ions (Li\u207a) are needed to balance one phosphate ion (PO\u2084\u00b3\u207b).<\/p>\n\n\n\n<p>On the other hand, molecular compounds are formed from nonmetals that share electrons through covalent bonds. They typically have lower melting points and do not conduct electricity in solution. Water (H\u2082O) is a common molecular compound, known for its liquid state at room temperature and its vital role in life. Other examples include phosphorus tribromide (PBr\u2083) and dinitrogen pentoxide (N\u2082O\u2085). These compounds are often named using prefixes to indicate the number of each atom.<\/p>\n\n\n\n<p>Understanding the distinction between ionic and molecular compounds is key to predicting their behavior, reactivity, and applications in various scientific and industrial contexts.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"852\" height=\"1024\" src=\"https:\/\/gaviki.com\/blog\/wp-content\/uploads\/2025\/06\/learnexams-banner8-674.jpeg\" alt=\"\" class=\"wp-image-35389\" srcset=\"https:\/\/gaviki.com\/blog\/wp-content\/uploads\/2025\/06\/learnexams-banner8-674.jpeg 852w, https:\/\/gaviki.com\/blog\/wp-content\/uploads\/2025\/06\/learnexams-banner8-674-250x300.jpeg 250w, https:\/\/gaviki.com\/blog\/wp-content\/uploads\/2025\/06\/learnexams-banner8-674-768x923.jpeg 768w\" sizes=\"auto, (max-width: 852px) 100vw, 852px\" \/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Ionic Compounds with Polyatomic Ions 1. Physical properties Compound K2CO3; Appearance: White, solid, crystalline Density: 2.29 g\/cm\u00c2\u00b3 Melting Point: 891\u00c2\u00b0C Formulas of ionic compounds: Name: Potassium carbonate Positive Ion: K1+ Negative Ion: CO3 Formula: K2CO3 Name: Sodium nitrate Positive Ion: Na1+ Negative Ion: NO3 Formula: NaNO3 Name: Calcium bicarbonate Positive Ion: Ca2+ Negative Ion: HCO3 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-35388","post","type-post","status-publish","format-standard","hentry","category-quiz-questions"],"_links":{"self":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/35388","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/comments?post=35388"}],"version-history":[{"count":1,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/35388\/revisions"}],"predecessor-version":[{"id":35390,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/35388\/revisions\/35390"}],"wp:attachment":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/media?parent=35388"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/categories?post=35388"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/tags?post=35388"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}