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Lina20 [59]
4 years ago
5

Why phenolphthalein is used in experiment?

Chemistry
1 answer:
Dominik [7]4 years ago
4 0
In an acid-base titration, the neutralization reaction between the acid and base can be measured with either a color indicator or a pH meter. In this experiment, aphenolphthalein<span> color indicator will be </span>used<span>.
 </span>Phenolphthalein<span> is colorless in acidic solutions and pink in basic solutions.
Hope this helped 
: )</span>
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A metallic material that is made by uniformly mixing copper with zinc to form bronze.
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3 years ago
Two flasks are connected by a closed valve. One contains gas particles and the other contains a vacuum. If the valve is opened s
Hatshy [7]

Answer: The process by which the particles can reconvene entirely in one of the flasks is: NONSPONTANEOUS.

Explanation:

The spontaneity of a process can affect the distribution of energy and matter within the system. Different chemical or physical processes have the natural tendency to occur in one direction under a given set of conditions. For example:

--> when water is pour down a hill it naturally flows down but it requires outside energy maybe from a water pump to flow up the hill and ,

--> during an iron rust, iron that is exposed to atmosphere will corrode, but rust is not converted to iron without intentional chemical treatment.

Therefore, a spontaneous process is one that occurs naturally under certain conditions. While a NONSPONTANEOUS process, on the other hand, will not take place unless it is initiated by the continual input of energy from an outside source. A process that is spontaneous in one direction under a particular set of conditions is nonspontaneous in the REVERSE direction.

From the two flasks that where connected through a valve, once the valve was opened, the gas spontaneously becomes evenly distributed between the flasks. To reverse this, it would require an external energy making the reconvening of the particles back to the first flask a NONSPONTANEOUS PROCESS .

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3 years ago
A mixture of gasoline and air explodes when it encounters a spark. this is known as
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8 0
4 years ago
Which best explains why water boils in a pot sitting over fire?
horsena [70]

Answer:

C

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6 0
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When the following redox equation is balanced with smallest whole number coefficients, the coefficient for nitrogen dioxide will
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<h3>What is a redox reaction equation?</h3>

A redox reaction equation shows the species that were oxidized or reduced in a redox reaction. In this case, we are asked for the coefficients in a balanced redox reaction equation.

We must recall that five electrons were lost/gained in the process hence the balanced reaction equation is;

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The coefficients in the balanced equation therefore are; 1/2, 5, 1, 5, 2, 1.

Learn more about redox reaction: brainly.com/question/13293425

7 0
2 years ago
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