Answer:
Explanation:
any type of spreading disease that kills
This is all no chemistry but the answer is C
<h2>
NH3 is a weak alkali that does not dissociate fully into its solution. Which of the following is true about NH3?
</h2><h2>
</h2><h2>
A. It has a very low pH.
</h2><h2>
B. It's dissociation is a reversible reaction.
</h2><h2>
C. It has a high H+ concentration.
</h2><h2>
D. It will release all of its OH- ions.</h2>
Explanation:
<h3>
NH3 is a weak alkali that does not dissociate fully into its solution: It's dissociation is a reversible reaction.
</h3><h3>
</h3>
Reactions are also :
Reversible reaction
A reaction in which products can combine back to give reactants under same given condition .
Example : N₂+H₂-------NH₃
Irreversible reaction
A reaction in which the products cant combine back to give reactants under same set of conditions .
Example : Burning of paper
Chlorine (Cl) forms a salt when it is combined with a metal. This element belongs in <span>halogens.
</span>
Answer:
pH = 8.34
Explanation:
The equilbriums of the amphoteric HCO₃⁻ (Ion of NaHCO₃) are:
H₂CO₃ ⇄ <em>HCO₃⁻</em> + H⁺ Ka1 <em>-Here, HCO₃⁻ is acting as a base-</em>
<em>HCO₃⁻</em>⇄ CO₃²⁻ + H⁺ Ka2 <em>-Here, is acting as an acid-</em>
Where Ka1 = 4.3x10⁻⁷ and Ka2 = 4.8x10⁻¹¹. As pKa = -log Ka:
pKa1 = 6.37; pKa2 = 10.32
As the pH of amphoteric salts is:
pH = (pKa1 + pKa2) / 2
<h2>pH = 8.34</h2>
