Which of the following can not decompose on heating to give $\ce{CO_2}$? Describe the thermal stability of carbonates of alkali and alkaline earth metals. That’s … Thus the most stable species here shall be BaCO3. Explain giving reason. Aside from some arcane extreme conditions (extreme pressures and temperatures combined, for example), I think that if it decomposes, it will probably produce carbon dioxide. The usual method for the preparation of the carbonates of the alkali and alkaline earth metals is by reaction of an oxide or hydroxide with carbon dioxide. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. The thermal stability of alkaline earth metal carbonates–MgCO3, CaCO3, SrCO3 and BaCO3, follows the order. so, the correct order of thermal stability of given carbonates is:BeCO3 < MgCO3 < CaCO3 < K2CO3Be, Mg and Ca present in second group and K … Your "answer" lacks credibility otherwise. MO + 2HX → MX 2 + H 2 O . So there is no effect of heating on it. Concatenate files placing an empty line between them, Realistic task for teaching bit operations, One likes to do it oneself. These halides can also be prepared by the action of halogen acids (HX) on metals, metals oxides, hydroxides and carbonates. Also, for the same period the group 1 carbonate is relatively more stable. The alkali metals form salt like hydride by the direct synthesis at elevated temperature. Table 1 It shows that the composition of the alkali carbonates is richer in C and O than the alkaline earth metal ones, pre-sumably due to their higher hygroscopicity. Do rockets leave launch pad at full thrust? T.S ∝ Ionic character (for poly atomic anion). The stability of group 1 and 2 carbonates increases down the group therefore you can expect that the lower the metal in the periodic table the more stable is its corresponding carbonate. How can deflection and spring constant of cantilever beam stack be calculated? Use MathJax to format equations. Lithium Carbonate (Li 2 CO 3) Uses: drug development. However, carbonate of lithium, when heated, decomposes to form lithium oxide. Lithium does not react with ethyne. Appearance: white powder, fragrance-free; Sodium Carbonate (Na 2 CO 3) Other carbonates form by precipitation. The thermal stability of carbonates increases with the increasing basic strength of metal hydroxides on moving down the group.Thus the order is The bicarbonates of all the alkali metals are known. @KartikWatwani sorry for the late follow-up, but I wanted to add this: so you're asking as to whether if you heat up sodium carbonate, at what temperatures does is decompose WITHOUT producing carbon dioxide? Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. S - block elements - alkali and alkaline earth metals, Classification of elements and periodicity in properties, General principles and process of Isolation of metals, Purification and characteristics of organic compounds, Some basic principles of organic chemistry, Principles related to practical chemistry. That's just my opinion though, I am happy to be corrected. Group I cations increase in ionic radius down the group. Metal carbonates or hydrogen carbonates such as limestone (CaCO 3 ), the antacid Tums (CaCO 3 ), and baking soda (NaHCO 3 ) are common examples. Alkali and alkali earth metal carbonates and bicarbonates decomposition, oasis.postech.ac.kr/bitstream/2014.oak/11644/1/OAIR002402.pdf, Melting point of alkaline earth metal carbonates, Thermal stability of alkali metal hydrides and carbonates. asked May 27, 2019 in Chemistry by ManishaBharti ( 64.9k points) classification of elements See these links for sodium and lithium carbonates, the hydrocarbonate or barium. Most carbonates tend to decompose on heating to give the metal oxide and carbon dioxde. See Answer. Thermal stability of carbonates increases in a group as we move from top to bottom and decreases in a period as we move from left to right. The carbonates of alkaline earth metals can be regarded as salts of weak carbonic acid (H2CO3) and metal hydroxide, M (OH)2. Li 2 CO 3 , however is considerably less stable and decomposes readily. Does a hash function necessarily need to allow arbitrary length input? From your question, the heating temperature is unclear. Why does Steven Pinker say that “can’t” + “any” is just as much of a double-negative as “can’t” + “no” is in “I can’t get no/any satisfaction”? MCO3 —-> MO + CO2 We know that in the carbonate ion, the charge is delocalized and is thus highly polarizable. Which of the following carbonate of alkali metals has the least thermal stability? The carbonate ion has a big ionic radius so it is easily polarized by a small, highly charged cation. site design / logo © 2021 Stack Exchange Inc; user contributions licensed under cc by-sa. Hence there is no reaction and carbon dioxide is not released. Can 1 kilogram of radioactive material with half life of 5 years just decay in the next minute? Question: S-GROUP ELEMENTS C) E) 1) Mention 3 General Characteristics Of The S-block Elements That Distinguishes Them From The Other Elements Of The Periodic Table 2) Explain Why Group 2 Elements Never Form Mion. Want to see the step-by-step answer? rev 2021.1.11.38289, The best answers are voted up and rise to the top, Chemistry Stack Exchange works best with JavaScript enabled, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site, Learn more about Stack Overflow the company, Learn more about hiring developers or posting ads with us. 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