The equation CaSO4 + Ba(OH)2 -> BaSO4 + Ca(OH)2

  1. Detailed information about the equation CaSO4 + Ba(OH)2 -> BaSO4 + Ca(OH)2:

    • This equation describes a chemical reaction between calcium sulfate (CaSO4) and barium hydroxide (Ba(OH)2) to produce barium sulfate (BaSO4) and calcium hydroxide (Ca(OH)2).
    • The number of moles of each reactant must correspond to their coefficients in the equation, meaning 1 mole of CaSO4 reacts with 1 mole of Ba(OH)2 to produce 1 mole of BaSO4 and 1 mole of Ca(OH)2.

  2. Reaction conditions:

    • Both reactants must be in a state of dissolution in water to be able to come into contact and react with each other.
    • Sometimes high temperature is required to stimulate the reaction.

  3. Reaction process:

    • CaSO4 and Ba(OH)2 react with each other to form BaSO4 and Ca(OH)2.
    • BaSO4, once formed, will precipitate in the form of fine powder, making the solution cloudy.

  4. Phenomena observed:

    • During the reaction, the solution will change from clear to cloudy due to the formation of BaSO4 precipitate.
    • The remaining solution containing Ca(OH)2 can be tested with litmus paper. If the litmus paper turns blue, it is an indication of the presence of Ca(OH)2, an alkali substance.

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