Berikut ini merupakan larutan baku primer yang dapat digunakan untuk menstandarisasi larutan HCl ...Select one:a. NaOHb. Na2CrO4c. NaBrd. Na2CO3e. NaCl

Break Down the Problem

1. Identify the primary standard solution used for standardizing HCl.
2. Analyze the properties of each option provided.

Relevant Concepts

• A primary standard must be:
  1. Pure and stable.
  2. Have a known and consistent molecular weight.
  3. React completely and in a predictable manner with the solution being standardized (HCl in this case).

Analysis and Detail

1. NaOH: A strong base, commonly used for titration but not a primary standard because it absorbs moisture from air and can be impure.
2. Na2CrO4: A strong oxidizing agent, not typically used to standardize HCl.
3. NaBr: While stable, it does not provide a clear stoichiometric reaction needed for standardization.
4. Na2CO3: A stable and pure compound that can react with HCl in a simple acid-base reaction. This could be a candidate.
5. NaCl: A stable salt, but it is not used for titration because it does not provide a clear acid-base reaction to standardize HCl.

Verify and Summarize

After analyzing each option, Na2CO3 is suitable for use as a primary standard for standardizing HCl, due to its stability and predictable reaction.

Final Answer

d. Na2CO3 is the correct choice for standardizing HCl.