Answer:
(B) 3
Explanation:
Citric acid has an acid dissociation constant (Ka) of 8.4 × 10⁻⁴. When it forms a buffer with its conjugate base (citrate), we can calculate the pH using the Henderson-Hasselbalch's equation.
The optimum range of pH is pKa ± 1. The pKa is -log Ka = -log (8.4 × 10⁻⁴) = 3.1. The buffer would be more effective for pH between 2.1 and 4.1, especially around 3.1. So the best choice is (B) 3.
i bief it is d. halp you at all
Gas 2 because it has more particles that are colliding
Because its more soft then other metals
and other metals lose their color because they react with oxygen but gold doesn't react with oxygen
Nitrogen is N2 and as you've provided tin is Sn4+, the ionic compound is N4Sn3. Hope this helped :)