Sodium metal and water react to form hydrogen and sodium hydroxide. If 11.96 g of sodium react with water to form 0.52 g of hydr
1 answer:
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<h2>Answer:Ba
</h2>
Explanation:
option A:
is an anion and
is also an anion.So,there is no reaction.
option B:
reacts with
to form
.
Since is a first group element,all its salts are soluble in water.
Hence no precipitate is formed.
option C:
reacts with
to form
.
Since is a first group element,all its salts are soluble in water.
Hence no precipitate is formed.
option D:
reacts with
to form
.
Solubility of sulphates of second group elements decrease down the group.
So, is a precipitate.
Answer: Mg is the excess reactant for the forward reaction.
Explanation: It is a stoichiometry problem and solved with the help of given grams and using balanced equation. Grams of both the reactants are converted to moles and divided by their coefficients. The excess reactant is the one for which we get the highest number on doing above steps.
The balanced equation is:
Molar mass of silicon tetra chloride is 169.9 gram per mol and the molar mass of Mg is 24.3 gram per mol.
=
= 2.67 mol Mg
From balanced equation, the coefficient of silicon tetra chloride is 1 and that of Mg is 2. So, we will divide the moles of silicon tetra chloride by 1 and that of Mg by 2 and see which one gives highest number.
For silicon tetra chloride, = 0.317
and for Mg, = 1.34
The highest number is for Mg and so the excess reactant for the forward reaction is Mg.