Standard Base and Unknown Acid Obtain approximately 60 mL of the unknown acid so

Question

Standard Base and Unknown Acid Obtain approximately 60 mL of the unknown acid solution in a clean, dry 100mL or 150mL beaker. Label this flask as "Unknown Acid". Obtain approximately 35 mL of the RNH2 TRIS standard base solution in a clean, dry 100 or 150-mL beaker. Label the beaker as "Standard Base". Do NOT take more than 35mL, which should be enough for the entire experiment. If you need more TRIS, you can always obtain it later during the experiment. Record the exact concentration including the uncertainty of the standard base in your lab notebook.

Explanation / Answer

To get the concentration of unknown acid, you need to calculate the moles of unknown acid.

Concentration of standard base is known and volume is also known, so you can calculate the moles of base in the sample using-

Moles = Molarity (or Concentration) x Volume

Same number of moles will react with acid in neutralization reaction. So you get the moles of acid and then concentration is given as-

Concentration = Moles / Volume

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