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If this is the outcome of a (too) simplified calculation formula for pH of hydroxide solutions, then here is the 'missing' part to correct this 'false' answer (or outcome):
pH = 14.0 - pOH = 14.0 - [-log(OH-)] (this is generally valid at room temperature 25oC)
- simplified: pH = 14.0 - [-log(OH-)] = 14.0 + log(NaOH) = 14-[log(10-8)]= 6
- almost (but sufficiently) correct: .... = 14.0 + log[(NaOH) + (1.0*10-7)]
so by adding the amount of OH- ions, already present in pure water. This can NOT longer be ignored when NaOH concentration is very diluted, below 10-6 mol/L.
So when pHoutcome < 8 for dilute bases it should be 'recalculated' by addition of 10-7 before taking any log !
(The same is analogously valid for dilute acids when pHoutcome > 6)
pHoutcome = 6 for this NaOH concentration (which appears to have been (NaOH) = 1.0*10-8) is lower than 8 so is to be corrected as follows:
pH = 14.0 + log[(NaOH) + (1.0*10-7)] = 14 + log[1.0*10-8 + 1.0*10-7] =
= 14 + log[1.1*10-7] = 14 - 6.96 = 7.04 = 7.0
(and not 6 as in the simplified formula outcome)
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∙ 10y ago
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What is 6N NAOH?
The NaOH is sodium hydroxide, which is a strong base. The mM seems to be a garbled term. Possibly you are thinking of ml, milliliters.
What is the base of an acid?
There's no such thing as a base of an acid! A base is a substance with a pH of 8-14, and an acid is a base with a pH of 0-6. A neutral substance has a pH of 7.
Is a pH of 11.5 acidic basic or neutral?
yes. 1-6 is acid 7 is neutral and 8-14 is base so 11 is base.
How are pH acids and bases different?
If it is an acid, the pH is 6 and lower. If it is a base, the pH is 8 and higher.
Is ph of 0-6 an acid or a base?
It is an acid.
What is 6N NAOH?
The NaOH is sodium hydroxide, which is a strong base. The mM seems to be a garbled term. Possibly you are thinking of ml, milliliters.
What values on the pH scale indicate a base?
Bases have a pH > 7.0 BUT this merely describes the concentration of ions. Strong usually describes if all the substance ionizes, not how many ions are present. EX. NaOH is a strong base, but the pH of a solution of NaOH can be anywhere from 7.1 to 14 depending on how much has been dissolved.
What is a base on the pH scale?
A base is anywhere from 8 to 14 on the Ph scale. If a base of about 8 is added to and acid of about 6, the Ph will be balanced out.
What is the base of an acid?
There's no such thing as a base of an acid! A base is a substance with a pH of 8-14, and an acid is a base with a pH of 0-6. A neutral substance has a pH of 7.
What is the pH for base?
An acid is 0-6 on the pH scale. Neutral is around a 7. Around 8 and above is the pH for a base.
Is a pH of 11.5 acidic basic or neutral?
yes. 1-6 is acid 7 is neutral and 8-14 is base so 11 is base.
How are pH acids and bases different?
If it is an acid, the pH is 6 and lower. If it is a base, the pH is 8 and higher.
Is ph of 0-6 an acid or a base?
It is an acid.
What is the change in PH when an alkali is slowly added to an acidic solution?
The actual answer depends on the strength of the acid / alkali used. However the pH will change from around 1-6 to 8-14 depending on the strength of the acid / base. pH ~1 for strong acid pH ~6 for weak acid pH ~8 for strong base pH ~14 for strong base
What changes in PH occurs if an alkali is slowly added to an acidic solution?
The actual answer depends on the strength of the acid / alkali used. However the pH will change from around 1-6 to 8-14 depending on the strength of the acid / base. pH ~1 for strong acid pH ~6 for weak acid pH ~8 for strong base pH ~14 for strong base
How does the pH of an acid compare to the pH of a base?
the lower the pH the higher the hydrogen so acid 1-6 is higher in hydrogen compared to base 8-14. 7 is neutral
Is coffee an extremely basic?
Coffee is a mild base around 6 pH (water has a pH of 7).
