Well...nothing is so black and white. Some things react differently in different situations.
However...it is most likely you'd be using both of these as bases, and as such, KOH - potassium hydroxide - is likely slightly more reactive than NaOH.
This is by comparison of their pKa values alone, and many things may factor into reactivity.
If anything, they're both very similar in the grand scheme of things.
The difference is that sodium hydroxide contains the sodium ion (Na+) while potassium hydroxide contains the potassium ion (K+). Sodium and potassium are two different elements, though they have different properties.
Sodium hydroxide is a stronger base than potassium hydroxide. This is because sodium hydroxide has a higher dissociation constant and a higher solubility than potassium hydroxide, making it more effective at accepting protons.
Sodium reacts more vigorously with water than potassium because sodium has a lower ionization energy and is more reactive. When sodium comes into contact with water, it forms sodium hydroxide and releases hydrogen gas, resulting in a more rapid and vigorous reaction compared to potassium.
Potassium is more reactive than sodium. This is because potassium is lower in the alkali metal group and has one more electron, making it more likely to lose that electron and react with other elements.
Potassium is more reactive than lithium, which is more reactive than sodium. This trend is based on the alkali metal group's reactivity, with reactivity increasing as you move down the group due to the decreasing ionization energy and increasing atomic size.
The difference is that sodium hydroxide contains the sodium ion (Na+) while potassium hydroxide contains the potassium ion (K+). Sodium and potassium are two different elements, though they have different properties.
Sodium hydroxide is a stronger base than potassium hydroxide. This is because sodium hydroxide has a higher dissociation constant and a higher solubility than potassium hydroxide, making it more effective at accepting protons.
Sodium reacts more vigorously with water than potassium because sodium has a lower ionization energy and is more reactive. When sodium comes into contact with water, it forms sodium hydroxide and releases hydrogen gas, resulting in a more rapid and vigorous reaction compared to potassium.
Potassium
Potassium is more reactive than sodium. This is because potassium is lower in the alkali metal group and has one more electron, making it more likely to lose that electron and react with other elements.
There are sodium hydroxide, strontium hydroxide, magnesium hydroxide, potassium hydroxide, calcium hydroxide and more.
Sodium
Potassium is more reactive than lithium, which is more reactive than sodium. This trend is based on the alkali metal group's reactivity, with reactivity increasing as you move down the group due to the decreasing ionization energy and increasing atomic size.
Francium is the most reactive alkali metal among francium, sodium, and potassium because it has the lowest ionization energy. Francium's reactivity increases moving down Group 1 of the periodic table. Sodium is more reactive than potassium due to sodium's lower ionization energy compared to potassium.
Potassium can displace sodium, as potassium is more reactive than sodium. When potassium is added to a solution containing sodium ions, a displacement reaction can occur where potassium replaces sodium in the chemical compound.
There is not a lot of difference. They are both powerful bases but potassium hydroxide is more expensive. Sodium hydroxide is manufacture by electrolysis of seawater. Potassium Hydroxide just does not have a cheap source of raw material as seawater!
It depends on the lab, but sodium bicarbonate, borax, sodium carbonate and sodium hydroxide (or their potassium equivalents) are popular alkalis with many uses.