Sulfuric acid

[dominicelliott]

"Let s assume the pH, as with most municipal tap waters, is
approximately 8 or 9. Begin adding 95% H2SO4 one drop at a time,
mixing thoroughly, and measuring the pH with the pH meter or the
range 5.0-6.5 pH papers between each drop until the pH is about 5.8
or 6.0."

I'm not sure if i read that the sulfuric acid has to be clear, or not.
I bought one bottle at home depot, virgin sulfuric acid. It's not clear, kind of rusty brownish.
Can this be ok to use to lower the PH?

Thank you.

[aperverb]

The color of sulfuric acid can vary depending on its purity and any impurities present. While clear sulfuric acid is often preferred for certain applications, the rusty brownish color you described might indicate some impurities. However, for adjusting pH levels in water, the color of the sulfuric acid shouldn't be a significant issue as long as it's within the appropriate concentration and purity.