Investigation into the solubility of Calcium Hydroxide Ca(OH)2

Study on solubility planning of calcium hydroxide Ca (OH) 2 ========= Calcium hydroxide is a strongly basic base in water. For titration use approximately 0.015 mol dm -3 lime water. HCl is also used and the concentration is 0.3 mol dm -3. Objective: The purpose of the test was to determine the solubility of calcium hydroxide by titration to calculate the concentration. Plan: Fixture Holder Burette [Image] [Image] [Image] Perform this experiment using a titrator.

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

As we know the molar number of 25 cm, we can calculate the number of moles of calcium hydroxide per day. This is done by multiplying the previous answer by 40 (1000/25). It is now necessary to calculate the quality of calcium hydroxide formulation. Ca (OH) 40 + (2 × 16) + (2 × 1) = 74 g This is a mass of 1 mol. To calculate the mass of calcium hydroxide at 1 dm it is necessary to obtain the answer (molar quantity of 1 dm) from the previous one and multiply the quality of the formula by 74 g. Therefore, solubility of calcium hydroxide at g dm at room temperature was found.

In addition to simple oxide CaO, peroxide CaO can be prepared by directly oxidizing calcium metal under high pressure oxygen and there is some evidence of yellow superoxide Ca (O). Calcium hydroxide Ca (OH) 2 is a strong base but not as strong as barium, strontium or alkali metal hydroxide. All calcium tetrahalides are known. Calcium carbonate (CaCO 3) and calcium sulfate (CaSO 4) are particularly abundant minerals. As with strontium and barium and alkali metals and divalent lanthanides lanthanum and cerium, the calcium metal is directly dissolved in liquid ammonia to give a deep blue solution.