Carbon atoms are saturated with (surrounded by) Hydrogen atoms
The molar mass of Na₂SO₄ -
2 x Na - 2 x23 = 46
1 x S - 1 x 32 = 32
4 x O - 4 x 16 = 64
total = 46 + 32 + 64 = 142 g/mol
the molarity of solution - 2.0 M
in 1 L of solution , 2.0 moles
Therefore in 2.5 L - 2 mol/L x 2.5 L = 5 mol
then the mass of Na₂SO₄ required = 142 g/mol x 5 mol = 710 g
Answer:
Ag⁺ (aq) + Br⁻ (aq) ⇒ AgBr (s)
Explanation:
The reaction between silver nitrate and lithium bromide is as follows:
AgNO₃ (aq) + LiBr (aq)⇒ AgBr (s) + LiNO₃ (aq)
The aqueous compounds will dissociate into their ions, so the reaction may be rewritten as:
Ag⁺ (aq) + NO₃⁻ (aq) + Li⁺ (aq) + Br⁻ (aq) ⇒ AgBr (s) + Li⁺ (aq) + NO₃⁻ (aq)
In order to form the net ionic equation, we remove from the reaction any ions that did not undergo a chemical change (ions that are exactly the same on the reactants side and on the products side). These ions are referred to as spectator ions. The spectator ions are NO₃⁻, Li⁺, and Br⁻. The net ionic equation is then:
Ag⁺ (aq) + Br⁻ (aq) ⇒ AgBr (s)
