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pH Levels
pH levels are the measure of activity of hydrogen.
2,503 Questions
I know the pH of mango purees are around 3.4 to 4.6.
Mangoes should be somewhere close.
The pH of hydrogen fluoride (HF) is around 3.17. It is considered a weak acid in solution, a property that affects its pH level.
I am assuming that this FeCl3 is going to be aqueous, as it usually is. Therefore, Fe+3 forms complexes in water in the following manner:
B FeCl3(aq) +6H2O → [Fe(H2O)6]3+
Now, because the Fe has a positive charge, it will pull the negative electron cloud towards itself, making the bond holding the H on the OH weaker, which leads to an easier release of protons (H+). Therefore,
[Fe(H2O)6]3+ → [Fe(H2O)5]+2 + H+
As you can see, Fe is in the "net reaction" acting as an acid, as it makes the H2O's bound to it release H+ ions into the water. Therefore, FeCl3 is assigned a Ka value, which = 2.0 x 10-3.
Now, we need to set up our table:
FeCl3 →
Fe(H2O)5]+2
+
H+
Initial concentration
0.5 M
0.0 M
0.0 M
Change
(-) x
x
x
Final Concentration
0.5-x
x
x
So, we can set up our equilibrium constant expression:
Ka= [H+][ [Fe(H2O)5]+2]/[[Fe(H2O)6]3+]
we know Ka therefore:
2.0 x 10-3= x2/0.5-x
Solve for x, must use quadratic:
0.001-2.0 x 10-3x-x2=0
Solving the quadratic gives us:
x= -0.032639, 0.030639
The negative result is unphysical, because we cannot have a negative concentration, therefore, x= 0.030639, which from our graph tells us that the concentration of H+ = 0.030639M, so to find the pH:
-log( 0.030639)= pH = 1.51, so therefore, the pH of 0.5 M FeCl3 is 1.51.
Hope that helps, don't know if you needed to know all the details.
Praise God!
Eugene.
Does algae increase pH or decrease pH of water?
Algae draws all available CO2 out of water, causing its pH to increase.
What is the pH of unpolluted rainwater?
The pH of rainwater is normally from 6 - 6.5. Acid rain is rain with a pH of 5 and below.
Your pH levels are 6 is this ok?
Not at all. A swimming pool should be between 7.4-7.6 pH Your's is too acidic.
Are there any fruits with the pH level of 7-14?
yeah every fruit can have a pH level of 7-14 if if it added to orange juice.
The pH level of distilled water is typically around 7, which is considered neutral. However, because distilled water is very pure, it can easily absorb carbon dioxide from the environment, lowering its pH slightly.
The pH of C6H12O6 (glucose) cannot be determined because it is a neutral substance and does not ionize in water to produce H+ ions.
A substance with a pH of 7 is considered neutral. This means it is neither acidic (pH less than 7) nor basic (pH greater than 7). Pure water at room temperature has a pH of 7, making it neutral.
What is the pH level of limestone?
Limestone typically has a pH level ranging from 7 to 9, making it slightly alkaline. This pH level can help neutralize acidic soils and improve fertility for plants.
The pH of ketchup typically ranges from 3.9 to 4.2, making it slightly acidic.
The human body's pH is maintained by strict and complicated chemical reactions to maintain pH between 7.35 and 7.45. A pH above 7.45 is considered acidotic while a pH below 7.35 is considered alkalotic. A deviation of 1 point is usually associated with death.
What is the normal pH level in the small intestine?
its usually about 2-3 I believe the pH to be around pH 6-6.5 for the duodenum. The pH of the stomach is 1-3 so 2-3 is still in the stomach. The small intestine is anywhere between 6-8 as the pancreas dumps bicarbonate in.
A normal pH level in the human body is about 7.4, fairly neutral. The pH of skin in an adult should be around 5.4.
What pH levels are safe for skin?
Actually, I was looking for the answer to this question. So far I know that household vinegar has a pH of 2.3. It stings cuts, but does not do real damage. For cleaning minerals from an irrigation line, I need a pH of 2.0 using sulfuric acid, and it sometimes gets down to 1.7. I wear rubber gloves, but have sometimes spilled some on my skin with no noticeable ill effect. I'm looking for a more authoritative answer.
The pH leve of soil depends upon it's fertility. If the soil is used to fertilizers or pesticides, it becomes acidic, loses it's fertility and pH level goes down.
