{"id":45762,"date":"2025-07-01T11:26:34","date_gmt":"2025-07-01T11:26:34","guid":{"rendered":"https:\/\/gaviki.com\/blog\/?p=45762"},"modified":"2025-07-01T11:26:36","modified_gmt":"2025-07-01T11:26:36","slug":"write-the-name-from-the-formula-or-the-formula-from-the-name-for-each-hydrated-ionic-compound","status":"publish","type":"post","link":"https:\/\/gaviki.com\/blog\/write-the-name-from-the-formula-or-the-formula-from-the-name-for-each-hydrated-ionic-compound\/","title":{"rendered":"Write the name from the formula or the formula from the name for each hydrated ionic compound"},"content":{"rendered":"\n
Write the name from the formula or the formula from the name for each hydrated ionic compound. a. cobalt(II) phosphate octahydrate b. BeCl2 # 2H2O c. chromium(III) phosphate trihydrate d. LiNO2 # H2O<\/p>\n\n\n\n
The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n
Let’s break down each hydrated ionic compound to give the correct formula or name:<\/p>\n\n\n\n
a. Cobalt(II) phosphate octahydrate<\/strong><\/h3>\n\n\n\n
Cobalt(II)<\/strong> refers to cobalt with a +2 charge.<\/li>\n\n\n\n
Phosphate<\/strong> is the PO4^3\u2212 anion.<\/li>\n\n\n\n
The formula for cobalt(II) phosphate is Co3(PO4)2, because cobalt(II) has a +2 charge, and each phosphate ion has a -3 charge. To balance the charges, three Co2+ ions are needed for every two PO4^3\u2212 ions.<\/li>\n\n\n\n
Octahydrate<\/strong> means there are 8 molecules of water (H2O) for every formula unit of the compound. The water molecules are associated with the ionic compound in the crystal structure, so the complete formula is Co3(PO4)2\u00b78H2O.<\/li>\n<\/ul>\n\n\n\n
BeCl2<\/strong> is the formula for beryllium chloride, where Be is beryllium (with a +2 charge) and Cl is chloride (with a -1 charge). To balance the charges, one beryllium ion combines with two chloride ions.<\/li>\n\n\n\n
Dihydrate<\/strong> indicates there are two molecules of water associated with each formula unit of beryllium chloride. Hence, the formula is BeCl2\u00b72H2O.<\/li>\n<\/ul>\n\n\n\n
c. Chromium(III) phosphate trihydrate<\/strong><\/h3>\n\n\n\n
Chromium(III)<\/strong> refers to chromium with a +3 charge.<\/li>\n\n\n\n
Phosphate<\/strong> is PO4^3\u2212.<\/li>\n\n\n\n
The formula for chromium(III) phosphate is CrPO4, because the charge on the chromium ion (+3) is balanced by the charge on the phosphate ion (\u22123).<\/li>\n\n\n\n
Trihydrate<\/strong> means three molecules of water are associated with each formula unit of chromium(III) phosphate, so the complete formula is CrPO4\u00b73H2O.<\/li>\n<\/ul>\n\n\n\n
LiNO2<\/strong> is lithium nitrite, where Li is lithium with a +1 charge, and NO2 is the nitrite ion with a -1 charge. The charges balance out with one lithium ion for each nitrite ion.<\/li>\n\n\n\n
Monohydrate<\/strong> means one water molecule is associated with each formula unit of lithium nitrite, so the complete formula is LiNO2\u00b7H2O.<\/li>\n<\/ul>\n\n\n\n\n\n\n\n
These names and formulas are derived based on the conventions for naming hydrated ionic compounds, where the number of water molecules is indicated by prefixes like “mono,” “di,” “tri,” and so on.<\/p>\n\n\n\n<\/figure>\n","protected":false},"excerpt":{"rendered":"
Write the name from the formula or the formula from the name for each hydrated ionic compound. a. cobalt(II) phosphate octahydrate b. BeCl2 # 2H2O c. chromium(III) phosphate trihydrate d. LiNO2 # H2O The Correct Answer and Explanation is: Let’s break down each hydrated ionic compound to give the correct formula or name: a. Cobalt(II) […]<\/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-45762","post","type-post","status-publish","format-standard","hentry","category-quiz-questions"],"_links":{"self":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/45762","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=45762"}],"version-history":[{"count":1,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/45762\/revisions"}],"predecessor-version":[{"id":45764,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/45762\/revisions\/45764"}],"wp:attachment":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/media?parent=45762"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/categories?post=45762"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/tags?post=45762"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
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