If approximately equal volumes of an acid and a bace of a equal strength are combined the resulting solutin should have a pH of
2 answers:
Answer : The correct option is, around 7
Explanation :
pH : It is defined as the negative logarithm of hydrogen ion or hydronium ion concentration.
The pH range is, 1 to 14.
When the value of pH is less then 7 then the solution will be acidic.
When the value of pH is more then 7 then the solution will be basic.
When the value of pH is equal to 7 then the solution will be neutral.
As per question, when approximately equal volumes of an acid and a base of a equal strength are combined then the resulting solution should have a pH of around 7 because when equal amount of acid and base are combined it form neutral solution and the neutral solution has pH around 7 or equal to 7.
Hence, the correct option is, around 7
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Answer:
121Sb=57.2%
123Sb=42.8%
Explanation:
We are given that
Atomic mass of 121Sb=120.904 amu
Atomic mass of 123Sb=122.904 amu
Average atomic mass of antimony=121.760 amu
We have to find the percent of each of the isotope.
Let x be the percent of 121Sb and 1-x be the percent of 123Sb.
Using formula of average atomic weight
Average atomic weight=atomic weight of 121Sb percentage abundance of isotope 121Sb+atomic weight of 123Sb
percentage abundance of isotope 123Sb
Substitute the values
Percentage of 121Sb=57.2%
Abundance of isotope 123Sb=1-0.572=0.428
Percentage of isotope 123Sb=42.8%
Answer
a) charge of the sodium ion is,
q = n e
q = 2.68 x 10¹⁶ x 1.6 x 10⁻¹⁹
q = 4.288 x 10⁻³ C
charge of the chlorine ion is,
q' = n e
q' = 3.92 x 10¹⁶ x 1.6 x 10⁻¹⁹
q' = 6.272 x 10⁻³ C
the current
b) positive ion moves toward negative electrode hence direction of will be in the direction toward negative electrode.