Some students work in a group to conduct an investigation to form some insoluble ionic substances. They will write the formula and name for each compound they observe. Students will be using spot plates to easily see the color of the precipitates. How should students clean the spot plates after the investigation is complete?

CHEMISTRY

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Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

A	Students should wash the spot plates under running water.
B	Students should follow the teacher’s instructions.
C	Students should wipe the spot plates with a paper towel.
D	Students should combine the substances and pour down the drain.

Explanation:

Detailed explanation-1: -Sand ( SiO 2 ), Chalk ( CaCO 3 ), Benzene ( C 6 H 6 ), Calcium Sulfate ( CaSO 4 ), Barium Sulfate ( BaSO 4 ), Strontium sulfate ( SrSO 4 ), Lead Sulfate ( PbSO 4 ), and many more are insoluble in water.

Detailed explanation-2: -A number of ionic compounds, e.g AgCl, CaF2, BaSO4 are insoluble in water. This is because these molecules have exceptionally high attractive forces in their lattice. Ionic compounds having lattice energy higher than hydration energy are insoluble in water.

Detailed explanation-3: -But some ionic compounds do not get dissolved in water. This is because the ionic forces in those molecules are very high, which creates high lattice energy. Due to high lattice energy, the hydration energy decreases that makes those compounds insoluble in water.

There is 1 question to complete.

SSC MTS EXAM

SSC

CHEMISTRY