Answer:
sunny i guess but if u don't feel sunny the warm
The statement about
“Upwelling is a process in which warm, nutrient rich water from the deep ocean
rises to the surface” is false. It must be the cold, nutrient rich water from
the deep ocean that must rise to the surface and replaces warm surface water.
The cause of upwelling is when the local wind patterns blow along the northwest
coast of South America causing local surface currents to move away. The warm
water is then replaced by the deep cold water
Volume required for neutralization V will be:
V * 0.2125 M HCl = 25 mL * 0.17 M
V = 20 ml
First part:
When 10 mL is added we can apply Henderson equation to get the result, so:
The pH will be of basic buffer
pOH = pKb + log(salt/base)
or pOH = 4.19 + log (0.2125*10 / 25*0.17 - 10*0.2125 )
pOH = 4.19 and pH = 14 - 4.19 = 9.81
Second part:
When 20 ml is added, there is only salt formed
The pH will be salt of strong acid and weak base
So pH = 7 - 0.5 pKb - 0.5 log C
where C is the concentration of the salt formed so:
pH = 7 - (0.5*4.19) - (0.5 log (25*0.17) / (25+20))
= 5.42
Third part:
When 30 ml of the acid has been added,
The pH will be of the remaining strong acid
pH = - log (0.2125*10 / 25 + 30 )
= 1.326