Question

a set of five additional test tubes were prepared and used as controls. which of the following best describes the contents expected to be contained in one of the five control test tubes?

Answer 1

The only thing that should be in one of the five control test tubes is a

pH 4 buffer solution and hydrogen peroxide.

What do buffer solutions entail?

When an acidic or basic component is added, a buffered solution can withstand the pH change. It can keep the pH of the solution largely stable by neutralizing small amounts of added acid or base. This is crucial for procedures and/or reactions that call for narrow pH ranges that are stable.

In acid-base chemistry, a buffer is a very helpful solution. The pH can occasionally change rapidly and dramatically when solutions combine with a strong acid or base. The pH can change more gradually by neutralizing some of the additional acid or base with a buffer solution.

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