Some students performed a titration between 20.0 mL of 0.5 M hydrochloric acid and 1.0 M potassium hydroxide solution. The stude
nts collected data and plotted the graph below. Which statement correctly explains the reaction at point D?
OPTION A) All hydroxide ions have reacted. There is no excess of hydroxide ions at this point.
OPTION B) The volume of base that has been added is equal to the volume of acid in the flask; this helps in balancing the ions present, making the pH of the solution neutral.
OPTION C) All hydrogen ions and all hydroxide ions have reacted to produce water, and so neither ion remains free in solution.
OPTION D) There are extra hydrogen ions in solution. As the base is added, the pH increases exponentially.
OPTION A) All hydroxide ions have reacted. There is no excess of hydroxide ions at this point.
OPTION B) The volume of base that has been added is equal to the volume of acid in the flask; this helps in balancing the ions present, making the pH of the solution neutral.
OPTION C) All hydrogen ions and all hydroxide ions have reacted to produce water, and so neither ion remains free in solution.
OPTION D) There are extra hydrogen ions in solution. As the base is added, the pH increases exponentially.
2 answers:
You might be interested in
Answer:
The decreasing order of bond length in the carbon - carbon bonds will be:
Explanation:
Bond length is defined as average distance between two nuclei of bonded atoms in a molecule.Bond length is inversely proportional to the number of bonds present between two atoms.
...[1]
Bond energy is defied as amount of energy required to break apart the bond of 1 mole of molecule into their individual atom. Bond energy is directly proportional to the number of bonds present between two atoms.
..[2]
From [1] and [2]:
hybridized
hybridized
hybridized
Extent of overlapping of orbitals in these hybridization;
Higher the overlapping of orbital more closer will be both atoms to each other and shorter will be the bond lenght.
So, the decreasing order of bond length in the carbon - carbon bonds will be:
<u>Answer:</u> The specific heat of calorimeter is 30.68 J/g°C
<u>Explanation:</u>
When hot water is added to the calorimeter, the amount of heat released by the hot water will be equal to the amount of heat absorbed by cold water and calorimeter.
The equation used to calculate heat released or absorbed follows:
......(1)
where,
q = heat absorbed or released
= mass of hot water = 46.7 g
= mass of cold water = 45.33 g
= final temperature = 59.4°C
= initial temperature of hot water = 80.6°C
= initial temperature of cold water = 40.6°C
= specific heat of hot water = 4.184 J/g°C
= specific heat of cold water = 4.184 J/g°C
= specific heat of calorimeter = ? J/g°C
Putting values in equation 1, we get:
Hence, the specific heat of calorimeter is 30.68 J/g°C