TOP bar วืธีทดลTeacher Tip: If you want to experiment as follows:1. This test must be used with the same mass and water must be the same volume every time to compare the solubility of substances in the water.2. should write numbers or letters assigned to each test tube tubes are known as? Experimental method1. Enter one or more of the following substances is a type of LiCl Na2HPO4 Na2CO3 0.5 g Na2SO4 KNO3 in vitro one type medium-sized tubes and each tube into the fill distilled water 10 cm3 aqueous solution storage solution, shake the observations to the next trial.2. Insert the CaCl2 MgCl2, BaCl2, SrCl2 0.5 g per tube, a large trial in 4 tubes each, fill distilled water into a tube of 10 cm3 aqueous solution storage solution, shake the observations to the next trial.3. decant MgCl2 aqueous solution based on small trials put the tubes 2 5 tubes per cm3 and melting additives 2 LiCl Na2CO3 Na2HPO4 KNO3 and a type 1 message from Na2SO4 2 cm3 into each tube, respectively.4. perform the experiment, as well as article 3, but using aqueous solution BaCl2 CaCl2 and MgCl2 aqueous solution instead of SrCl2. TOP trial results 1. Na2SO4 CaCl2 MgCl2 KNO3 Na2HPO4 Na2CO3 LiCl SrCl2 and BaCl2 soluble.2. when the combination of the two types of solution will be effective as follows:Na2HPO4 Na2CO3 LiCl aqueous solution Na2SO4 KNO3MgCl2 CaCl2 SrCl2 BaCl2 Discussion after the lab TOPFrom the experimental results. Summarized as follows:1. hydrogen carbonate, chloride, nitrate, and phosphate compounds sulfate of potassium, sodium, lithium dissolved in the water as well.2. compounds and chloride group IIA elements occupied Nicaea in Musashi's as well. When the solution of a compound of the elements mixed with villages of IA solution of a compound of the elements among the IIA found that some of the tubes formed sediments of sludge should be a compound that moo Moo IA IIA, because every type of compound that is soluble. Write the equation shows the occurrence of sediments of IIA group elements as follows:Reaction between compound carbonate (CO32-) with the elements among the IIA.MgCl2(aq) + Na2CO3(aq) ® MgCO3(g) + 2NaCl(aq)Mg2+(aq) + CO32-(aq) ® MgCO3(g) CaCl2(aq) + Na2CO3(aq) ® CaCO3(s) + 2NaCl(aq)Ca2+(aq) + CO32-(aq) ® CaCO3(s) SrCl2(aq) + Na2CO3(aq) ® SrCO3(s) + 2NaCl(aq)Sr2+(aq) + CO32-(aq) ® SrCO3(s) BaCl2(aq) + Na2CO3(aq) ® BaCO3(s) + 2NaCl(aq)Ba2+(aq) + CO32-(aq) ® BaCO3(s) ReverseReaction between compound hydrogen phosphate (HPO42-) with the elements among the IIA.MgCl2(aq) + Na2HPO4(aq) ® Mg3HPO4(s) + 2NaCl(aq)Mg2+(aq) + HPO42-(aq) ® Mg3HPO4(s) CaCl2(aq) + Na2HPO4(aq) ® Ca3HPO4(s) + 2NaCl(aq)Ca2+(aq) + HPO42-(aq) ® CaHPO4(s) SrCl2(aq) + Na2HPO4(aq) ® SrHPO4(s) + 2NaCl(aq)Sr2+(aq) + HPO42-(aq) ® SrCO3(s) BaCl2(aq) + Na2HPO4(aq) ® BaHPO4(s) + 2NaCl(aq)Ba2+(aq) + HPO42-(aq) ® BaHPO4(s) Reverse Reaction between compounds sulphate (SO42-) with the elements among the IIA.CaCl2(aq) + Na2SO4(aq) ® CaSO4(s) + 2NaCl(aq)Ca2+(aq) + SO42-(aq) ® CaSO4(s) SrCl2(aq) + Na2SO4(aq) ® SrSO4(s) + 2NaCl(aq)Sr2+(aq) + SO42-(aq) ® SrSO4(s) BaCl2(aq) + Na2SO43(aq) ® BaCO3(g) + 2NaCl(aq)Ba2+(aq) + SO42-(aq) ® BaCO3(g) Reverse 3. when mixing the two types of solution together and there are no sediments occurs. Indicates that a new substance that occurs is the ion in aqueous solution because these substances are soluble.Additional hintsThe table shows saphaplalai in water (Solubility) of the elements among the IA literature reviewed about the saphaplalai in the water of the elements among all the IA is not trial and experiment. As follows:The table shows some of the compound's water saphaplalai in the type of the elements among the IA.That the quantity of salt dissolved in water (g/100 g) Cl- CO32- NO3- SO42- HPO42-Li 86.2 (1) 1.54 34.8 (3) 34.9 (1) –Na 35.7 21.52 (10) 92.1 11.0 (10) 4.15 (12)K 23.8 112.0 13.3 12.0 167.0Rb 77.0 450.0 44.3 42.4 -Cs 162.2 260.5 9.2 167.0 - Summary of experimental results.When comparing the solubility of water in compounds of the elements among the IA and IIA found that compounds of the elements among the IA soluble compounds of the elements for the IIA village compounds soluble compounds is Chennai city rotlae compounds and hydrogen chloride, carbonate, sulfate, phosphate compounds are mostly insoluble, except for magnesium sulfate.
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