Answer:
I think third C12/hv is right answer
Explanation:
The highest number is the strongest base. Therefore the pH of 12 is the strongest base here (C).
Answer:
The lower the hydrogen ion concentration, the higher the pH.
Step-by-step explanation:
This effect comes from the definition of pH:
pH = -log[H₃O⁺]
Consider two solutions.
Solution A has [H₃O⁺] = 10⁻¹ mol·L⁻¹; Solution B has [H₃O⁺] = 10⁻¹⁰ mol·L⁻¹.
Solution B has the <em>lower [H₃O⁺]</em>.
Now, take the logarithm of each concentration.
Solution A: log[H₃O⁺] = log10⁻¹ = -1; Solution B: log[H₃O⁺] = log10⁻¹⁰ = -10
Solution B still has the <em>lower value</em>.
However, pH is the <em>negative</em> logarithm.
When we take negative logarithms, we get
Solution A: pH = 1; Solution B: pH = 10
Solution B has the lower [H₃O⁺], but the higher pH.
The lower the hydrogen ion concentration, the higher the pH.
I think it may be B, because this reaction may have produced heat &/or light. I think energy could be decreased that way.. sorry I couldn’t be a better help but I hope this sort of gives you an idea ;w;
Answer:
Molarity = 54.50 M
Explanation:
Molarity is defined as the number of moles of a solute in 1 liter of solution. It has mol/l unit.
Molar mass of glucose, C6H12O6 = (6*12) + (1*12) + (16*6)
= 72 + 12 + 96 = 180g/mol
Density of glucose solution = 1.03g/ml
Density in g/l = 1.03g/ml * 1ml/10^-3l
= 1030g/l
10.5% mass of glucose = 10.5/100 * 180
= 18.9g/mol
Molarity = density (g/l)/molar mass (g/mol)
= 1030/18.9
= 54.50 M