Pretend you are taking a melting point of diphenylamine. You see some shrinking starting at a temperature of 50.3°C. You see a droplet of liquid at a temperature of 53.6°C. The sample is completely liquid by 54.8°C. How should you report the melting point?

Achemistry student weighs out of phosphoric acid , a triprotic acid, into a volumetric flask and dilutes to the mark with distilled water. he plans to titrate the acid with solution. calculate the volume of solution the student will need to add to reach the final equivalence point. round your answer to significant digits.

What are the percent by mass of copper in penny lab

You encounter a solution that is acidic and you decide to test it by adding a small amount of a strong acid. the ph lowers slightly but is approximately unchanged, and still remains acidic. what can you say about the solution? a. it is a buffer solution. b. it is not a buffer solution it is a strong acid solution. d. the solution has been neutralized. e. the solution has excess acid present