5. What is the nature of a solution of calcium hydroxide? How will you

1.	5. What is the nature of a solution of calcium hydroxide? How will you confirm it?
Answer» <html><body><p></p><p>Calcium hydroxide (traditionally called slaked <a href="https://interviewquestions.tuteehub.com/tag/lime-1073965" style="font-weight:bold;" target="_blank" title="Click to know more about LIME">LIME</a>) is an inorganic compound with the chemical formula Ca(OH)2. It is a colorless crystal or white powder and is produced when <a href="https://interviewquestions.tuteehub.com/tag/quicklime-1175070" style="font-weight:bold;" target="_blank" title="Click to know more about QUICKLIME">QUICKLIME</a> (calcium oxide) is mixed, or slaked with water. </p><p></p><p>Identifying calcium hydroxide requires two tests. The first one measures the pH (acidity) of the calcium hydroxide solution to ensure it is basic. The second test, using a dilute solution of sulphuric acid, determines the presence of calcium <a href="https://interviewquestions.tuteehub.com/tag/ions-1051295" style="font-weight:bold;" target="_blank" title="Click to know more about IONS">IONS</a>.</p><p></p><p>Pour about 5 milliliters of the solution to be tested into the beaker.</p><p></p><p>Dip the strip of the pH paper strip into the solution and then take it out. The pH paper will change its color.</p><p>Compare the color of the paper with the <a href="https://interviewquestions.tuteehub.com/tag/scale-1195529" style="font-weight:bold;" target="_blank" title="Click to know more about SCALE">SCALE</a> enclosed with the pH paper to <a href="https://interviewquestions.tuteehub.com/tag/assign-364269" style="font-weight:bold;" target="_blank" title="Click to know more about ASSIGN">ASSIGN</a> the pH of the solution. A basic pH value such as 10 to 11 is indicative for calcium hydroxide.</p><p></p><p>Fill a pipette with the sulphuric acid solution.</p><p></p><p>Add five to ten drops of the solution from the pipette to the beaker.</p><p></p><p>Observe the solution in the beaker: If a white precipitate forms, it indicates the presence of calcium ions; this reaction follows the equation Ca(OH)2 + H2SO4 = CaSO4 (precipitate) + 2H2O.</p></body></html>

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5. What is the nature of a solution of calcium hydroxide? How will you confirm it?​

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5. What is the nature of a solution of calcium hydroxide? How will you confirm it?