Answer:
if the pH of a solution is 2.0 that means the solution would be acidic.
Explanation:
PKa2 (acid) + pKb2 (conjugate base) = 14 (pKw)
In diprotic acids:
Also, pKa1 + pKb2 = 14 and pKa2 + pKb1 = 14 and pKa1 always smaller than pKa2 because the first proton is always more acidic
Answer:
HNO₃.
Explanation:
- It is known that acids decrease the pH of the solution, while bases increase the pH of the solution.
So, HF and HNO₃ decrease the pH of the solution as they produce H⁺ in the solution.
While, KOH and NH₃ increase the pH of the solution as they produce OH⁻ in the solution.
HNO₃ will decrease the pH of the solution greater than HF.
- Because HNO₃ is strong acid that decomposes completely to produce H⁺ more than the same concentration of HF that is a weak acid which does not decomposed completely to produce H⁺.
<u>Any of five chemical substances that are not metals and that combine with hydrogen to form strong acid compounds from which simple salts can be made</u>
28. the pressure is greater outside the tube (D) than inside the tube(B). this is because when (A) is pressed it forces air out through (C). Spraying causes a region of low pressure inside the tube (B). This difference in pressure causes the rise of the concentrated fertilizer solution into the chamber which in turn is sprayed and the process continues.
27. momentum is the product of mass and the velocity of a particle.
momentum= mv where m is the mass in kg and v the velocity in m/s
thus from the question, m= 38kg v= 2.2m/s
therefore momentum=38kg×2.2m/s
=83.8kgm/s