Which anion will form a precipitate with Ca2+
2 answers:
Answer : Precipitation reactions occur when particular species of cations and anions in an aqueous solution combines to form an insoluble ionic solid which can be called as precipitate.
Here, the anions that will mostly form precipitate with are OH anions, Cl ions, Br ions,
ions,
ions.
Calcium has valency of 2 electrons in its valence shell. So, any anion that can satisfy the valency of calcium can form a compound with calcium.
You might be interested in
If one starts with 0.020 g of Mg, 0.0008 moles of H2 would be made if the reaction is complete.
Going by the balanced equation of reaction in the image, 1 mole of Mg will produce 1 mole of H2 in a complete reaction.
If 0.020 g of Mg is started with:
mole of Mg = mass/molar mass
= 0.020/24.3
= 0.0008 moles
Since the mole of Mg to H2 is 1:1, thus, 0.0008 moles of H2 will also be made from the reaction.
More on stoichiometry can be found here: brainly.com/question/9743981
