Ph indicator strips work by changing color in the presence of solutions with varied ph values. thinking about your procedure steps and results in part 1, why do you think the ph of the unknown weak acid was not determined with ph indicator strips until part 2?

This instrumentation is used to calculate the amount of unknown acid by measuring the amount of base it takes to neutralize the acid. To know if the solution has been neutralize there are two major ways. The first uses a pH meter in the beaker. The second uses an indicator. With this we can infer that the second method is much more detailed than the second one, that’s maybe why the pH of an unknown weak acid wasn’t determined not until the second method.

out of these options:

ability to burn paper

pure sodium reacting violently with water

the boiling point of water

helium does not tend to react with anything

i would say this is a physical property:

helium does not tend to react with anything

why? :

i said helium does not tend to react with anything because well, it reacts to ! but ability to burn paper, pure sodium reacting violently with water, & the boiling point of water are chemical or

physical properties: the properties of a substance that can be observed without changing the chemical makeup of the substance

chemical properties: properties of a substance relating to the chemical nature and reactivity of the substance

increased stability in the completion of fluorine's outer shell.