Answer:
a) pH of methylamine = 11.91
b) Volume of milliliters of titrant required to reach equivalence point = 36.59 mL
c) The pH at equivalence point = 5.92
Explanation:
a)
Before the titrant is added; the value for pH of the methylamine is calculated as:
where ;
b)
How many milliliters of titrant are required to reach the equivalence point?
Millimoles of base = (25.00 mL × 0.1500 M) of methylamine = 3.75
3.75 millimoles of HCl is required to reach equivalence point.
3.75 = Volume × 0.1025
Volume of milliliters of titrant required to reach equivalence point = 36.59 mL
c)
The total volume = 36.58 + 25.00 = 61.58 mL
Concentration of the salt; i.e [salt] =
[salt] = 0.061 M
pOH ≅ 8.08
pH = 14 - 8.08
pH = 5.92
Answer:
b) O2, because it has weaker intermolecular forces
Explanation:
The preassure is produced by the collisions of the gas molecules with the walls of its container.
When the intermolecular forces between the gas molecules increase, those molecules start to "slow down" by effect of the interactions. The collisions decrease in frequency and intensity producing a smaller preassure in the container.
Both O2 and Cl2 are non-polar gases and the only intermolecular forces they have are the London ones. Given that the O2 molecules are smaller than the Cl2, the last ones attract each other with more strengh.
Being all that said, the container with the oxygen is expected to have a higher preassure.
Sea water has salt so not that or a it is vineger mixed with water.c
Asexual reproduction only requires one parent organism. The daughter cells are copies of the original cell that divided to create the daughter cells. Sexual reproduction requires two parent organisms. The two parent cells combine to form a new unique daughter cell.
Explain how a change in thermal energy causes matter to change from one state to another. Give two examples
when thermal energy is absorbed or released it changes the state of matter from one state to another. melting ice and freezing a liquid are examples