Na2CO3+NaHCO3 용액에 들어있는 Na^+

Na2CO3+NaHCO3 용액에 들어있는 Na^+

 

 

Calculate the sodium ion concentration when 70.0 mL of 3.0 M sodium carbonate is added to 30.0 mL of 1.0 M sodium bicarbonate.

 

---------------------------------------------------

 

3.0 M Na2CO3 용액 70.0 mL

Na2CO3(aq) → 2Na^+(aq) + CO3^2-(aq)

[Na^+] = 2 × 3.0 = 6.0 M

(6.0 mmol/mL) × 70.0 mL = 420 mmol Na^+

 

 

1.0 M NaHCO3 용액 30.0 mL

NaHCO3(aq) → Na^+(aq) + HCO3^-(aq)

[Na^+] = 1.0 M

(1.0 mmol/mL) × 30.0 mL = 30 mmol Na^+

 

 

[Na^+]_tot = (420 + 30 mmol) / (70.0 + 30.0 mL)

= 4.5 mmol/mL

 

 

답: 4.5 M