The concentration in a mixture of 5.0 mL of 0.0504 M and 2 mL of 0.0210 M solution is M. The value of x is (Nearest integer)

Question

The  concentration in a mixture of 5.0 mL of 0.0504 M  and 2 mL of 0.0210 M  solution is  M. The value of x is (Nearest integer)

Canvas Classes · Accepted Answer

Step 1 — Moles after mixing (total volume = 7 mL):
Moles  =  mmol  M
Moles  =  mmol  M

Step 2 — Buffer (Henderson-Hasselbalch for base):

Step 3 — :

Answer: 3

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