Finding the Solubility of Ca(OH)2

Calculate the solubility of Ca (OH) 2 Purpose: - Calculate the solubility of Ca (OH) 2. In order to achieve the purpose of this experiment, it is necessary to plan and execute the experiment. The information I get is that the solubility of Ca (OH) 2 is 1 to 5 g / m 3. A standard solution of 1 M hydrochloric acid (HCl) was also prepared. This may need to be diluted to meet the measurement needs of the experiment. Apparatus: [IMAGE] × 1 g of Ca (OH) 2. * Pipette 25 cm 3 * 2 x 500 cm 3 beaker * Erlenmeyer flask 250 cm 3 * Burette * white tile * titration tube holder * bracket * indicator * 300 cm 3 hydrochloric acid - standard solution (concentrate)

To see this process in more detail, consider the reaction of Mg (OH) 2 precipitation. Consultation on the solubility guidelines in the experiment indicated that Ca (OH) 2 in slaked lime was moderately dissolved in water. Therefore, it can dissociate in water and provide one Ca 2+ ion and two OH - ions for each Ca (OH) 2 unit dissolved. The OH - ion reacts with Mg 2+ ions in water to form an insoluble precipitate. Since Ca 2+ ions are not affected by this reaction, they are not included in the net ion reaction (Equation 2). Remove them by separate reaction with CO 32 - ions from soda ash

In order to neutralize 25 cm of calcium hydroxide of unknown molar concentration, 04 mol / dm of hydrochloric acid was necessary. The solubility of the calcium hydroxide can then be calculated using the formula Ca (OH) (aqueous solution) + 2 HCl CaCl (aqueous solution) + 2 H 2 O. The molar amount of hydrochloric acid required to neutralize an unknown amount of 25 cm 2 of calcium is calculated as the amount of hydrochloric acid × 0.04 1000. The molar ratio of calcium hydroxide used in this formula depends on the ratio of 2 mol of hydrochloric acid to 1 mol of calcium hydroxide. The number can be calculated by dividing the answer. Up

3). Therefore, this compound is called sodium sulfite. When a given formulation is Ca (OH) 2, it can be seen that OH - is a hydroxide ion. Since the charge of calcium ion is 2+, there must be two OH ions in order to balance charge. Therefore, the name of the compound is calcium hydroxide. If a person asks to write a copper (I) chromate formula, the Roman numeral indicates that the copper ion is Cu + and it can be confirmed that the compound contains chromate ion (CrO 2 - III type Binary compounds are covalently bonded). Bonding occurs between nonmetallic elements and covalently bound compounds are also called molecules. In compounds, the first element is named first and is named after the complete element name. Route name + - ide suffix)

Most of the strong bases contain hydroxides, ie polyatomic ions. Therefore, strong bases are named according to the rules of named ionic compounds. For example, NaOH is sodium hydroxide, KOH is potassium hydroxide and Ca (OH) 2 is calcium hydroxide. Weak bases made from ionic compounds are also named using the ion nomenclature system. For example, NH 4 OH is ammonium hydroxide. Since weak bases have covalent bonds, they are sometimes also molecular compounds or organic compounds. Therefore, their nomenclature follows the rules of molecules or organic compounds. For example, methylamine (CH 3 NH 2) is a weak base. Some weaknesses have "common" names. For example, NH3 is called ammonia and its name does not come from any naming system.