It can happen if acid or base is weak. This is because of hydrolyses of the salts that are formed in this reactions.
When acid is weak, and base is strong, the pH at the equivalent point is going to be basic.
If base is weak and acid strong the pH is going to be acidic.
Answer:
<h2>The answer is 7.14 g/mL</h2>
Explanation:
The density of a substance can be found by using the formula
From the question
mass of metal = 25 g
volume = final volume of water - initial volume of water
volume = 28.5 - 25 = 3.5 mL
It's density is
We have the final answer as
<h3>7.14 g/mL</h3>
Hope this helps you
The half reaction that occur at the anode is
Zn (s)→ Zn²⁺ (aq) + 2e⁻
<u><em> Explanation</em></u>
- In galvanic cell oxidation take place at the the anode. That is there is lost of electrons at the anode.
- Zn loss two(2) electron to form Zn²⁺ ion.
- Zn is therefore oxidized since it's oxidation move from oxidation state 0 to oxidation state 2+.
It is nonpolar because neither side is more electronegative/greedy than the other, and the electrons are shared equally, therefore forming no positive/negative charge on opposite ends.
Answer:
1.343 atm
Explanation:
We are given the following;
Pressure, p = ?
Volume v = 27 L
Mass of oxygen = 44.9 g
Temperature, T = 315 K
The formular relating all these variables is the equation;
PV = nRT
where R = gas constant = 0.08206 L atm / mole K
To obtain n, we use;
number of moles, n = Mass / molar mass = 44.9 / 32 = 1.403 moles
From the ideal gas equation;
P = nRT / V
P = 1.403 * 0.08206 * 315 / 27
P = 36.27 / 27 = 1.343 atm