Answer:
NaCl: 184g
MgCl₂: 6.60g
Na₂SO₄: 9.26g
CaCl₂: 1.28g
KCl: 0.70g
NaHCO₃: 0.13g
Explanation:
To convert these concentrations to masses we need to convert molarity to moles and moles to grams using molar mass of each salt:
[CaCl₂] = [Ca²⁺] = 0.0115M
[HCO₃⁻] = [NaHCO₃] = 0.0015M
[SO₄²⁻] = [Na₂SO₄] = 0.0652M
[Mg²⁺] = [MgCl₂] = 0.0693M
[K⁺] = [KCl] = 0.0094M
And using the concentration of Cl⁻:
[Cl⁻] = [NaCl] + 2[MgCl₂] + 2[CaCl₂] + [KCl]
[3.32] = [NaCl] + 2[0.0693] + 2[0.0115] + [0.0094]
[NaCl] = 3.149M
The masses you need are:
<em>NaCl (Molar mass: 58.44g/mol):</em>
3.149mol/L * 1L * (58.44g/mol) =
<h3>184g NaCl</h3><h3 />
<em>MgCl₂ (Molar mass: 95.211g/mol):</em>
0.0693mol/L * 1L * (95.211g/mol) =
<h3>6.60g MgCl₂</h3><h3 />
Na₂SO₄<em> (Molar mass: 142.04g/mol):</em>
0.0652mol/L * 1L * (142.04g/mol) =
<h3>9.26g Na₂SO₄</h3>
CaCl₂<em> (Molar mass: 110.98g/mol):</em>
0.0115mol/L * 1L * (110.98g/mol) =
<h3>1.28g CaCl₂</h3>
KCl<em> (Molar mass: 74.55g/mol):</em>
0.0094mol/L * 1L * (74.55g/mol) =
<h3>0.70g KCl</h3><h3 />
<em>NaHCO₃ (Molar mass: 84g/mol):</em>
0.0015mol/L * 1L * (84g/mol) =
<h3>0.13g NaHCO₃</h3>
