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lions [1.4K]
3 years ago
15

Consider the temperature versus time graph below.

Chemistry
2 answers:
kati45 [8]3 years ago
8 0

Answer:

C)

Explanation:

Edgenuity 2020

Brrunno [24]3 years ago
7 0

Answer : At 120°C

Explanation : At 120°C temperature the boiling point of this substance is observed in the given graph.

As per the definition of the boiling point, <em>"It is the temperature at which the vapour pressure of the given substance becomes equal to the standard surrounding atmospheric pressure"</em>

Here, in this graph, it is clearly seen at 120°C where the substance raises to the high temperature and remains stable for certain period of time and then again slightly increases.

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Consider the following scenario
GarryVolchara [31]

Answer:

See explaination

Explanation:

Going by the clues that it is between Silver Flouride (AgF) and Sodium Fluoride (NaF) and since it is an aqueous solution , the 1 liter bottle is likely to be Sodium Chloride( NaCl). Going by the reaction,

AgF + NaCl= AgCl + NaF

Here, the color of AgCl is white, hence the solution cannot be AgCl.

Determination of NaCl

Determination of NaCl can be done by Mohr's Method or Volhard's method. But results in Volhard's method are more accurate . Its uses the method of back titration with Potassium Thiocynate which forms a AgCl precipitate . Prior to titration,excess AgNO3 ( The problem also has a clue that excess reagents are present in the lab ) is added to the NaCl solution so that all the Cl- ions react with Ag+. Fe3+ is then added as an indicator and the solution is titrated with KSCN to form a silver thiocyannite precipitate (AgSCN). Once all the silver has reacted, a slight excess of SCN- reacts with Fe3+ to form Fe(SCN)3 dark red complex. The concentration of Cl- is determined by subtracting the titer findings of Ag+ ions that reacted to form AgSCN from the Ag NO3 moles added to the solution. This is used because pH of the solution is acidic. If the pH of solution is basic, Mohr's method is used.

Reactions

Ag+ (aq)+ Cl-(aq) = AgCl(aq)

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7 0
3 years ago
Using are organic compounds made by living things
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Answer:

The chemical compounds of living things are known as organic compound because of their association with organisms and because they are carbon-containing compounds, which are the compounds associated with life processes, are the subject matter of organic chemistry

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Recovering the salt from a mixture of salt and water could best be accomplished?
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3 0
3 years ago
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Free_Kalibri [48]

Answer: Out of the given options acetic acid is in household vinegar.

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For example, vinegar (acetic acid) is used while making noodles.

Thus, we can conclude that out of the given options acetic acid is in household vinegar.

7 0
3 years ago
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