The acidity of a substance is measured by its pKa. A given acid will give up its proton to the base of an acid with a higher pKa value. The base of a given acid with deprotonate an acid with a lower pKa value.
The pKa of water is 15.74
The pKa of ammonia is 34
The pKa of acetylene is 25
What this means is that acetylene will not act as an acid in water and there will be essentially no dissociation of the hydrogen ion (the concentration of HCC- is essentially zero). This means that acetylene can dissociate in ammonia, but only to a small extent. Acetylene is considered a weak acid in ammonia.
See the Web Link for a very good explanation of this (with a direct comparison of water, ammonia, and acetylene). It is a pdf file.
No, pH 9 is actually more basic (alkaline) than pH 4. The pH scale is logarithmic, so each unit is 10 times more acidic or basic than the unit next to it. pH 4 is more acidic than pH 9.
No, a pH of 5 is ten times more acidic than a pH o6.
Imides are more acidic than amides because the hydrogen atom in imides is present on a nitrogen atom that is more electronegative than the oxygen atom in amides. This greater electronegativity leads to a more stable conjugate base after deprotonation, making the imide more acidic.
Mn2O7 is more acidic than MnO2. This is because Mn2O7 is a peroxide compound that contains more oxygen atoms and can release more H+ ions when dissolved in water, making it a stronger acid than MnO2.
4.22 is more acidic than 4.40. As the pH value decreases, the acidity of a solution increases.
Acetylene (C2H2) is a stronger acid than ethylene (C2H4) because the hydrogen in acetylene is more acidic due to the presence of a triple bond between the carbon atoms, leading to a greater electron-withdrawing effect. This results in a more polarized and weaker C-H bond in acetylene compared to the C-H bond in ethylene, making acetylene more prone to releasing a proton.
Yes, ethylene is more volatile than ethane. This is because ethylene has a lower boiling point (-103.7°C) and vapor pressure compared to ethane, making it easier for ethylene to transition from liquid to gas at lower temperatures.
Yes, NO2 is more acidic than CO2.
Ethylene glycol is more polar than ethanol - a rough measure of polarity is given by the dielectric constant. For example, water is 80, ethylene glycol 37, and ethanol 24.3. Water is the most polar, followed by ethylene glycol and ethanol. Another way to think about it is that ethanol has one alcohol group, and ethylene glycol has two, so it is more polar.
Anything with a pH of more than 7 is not acidic at all, it is alkaline.
Ethylene Glycol is about 11% more dense than pure water at the same temperature.
No, beer is actually less acidic than wine.
Glycerol is heavier than ethylene glycol because it has a higher molecular weight and more hydroxyl groups, which contribute to its increased density. This increased density results in a higher mass per unit volume compared to ethylene glycol.
Resorcinol is more acidic than catechol. This is because resorcinol has three -OH groups that are more acidic than the two -OH groups in catechol.
No, pH 9 is actually more basic (alkaline) than pH 4. The pH scale is logarithmic, so each unit is 10 times more acidic or basic than the unit next to it. pH 4 is more acidic than pH 9.
No, a pH of 5 is ten times more acidic than a pH o6.
Imides are more acidic than amides because the hydrogen atom in imides is present on a nitrogen atom that is more electronegative than the oxygen atom in amides. This greater electronegativity leads to a more stable conjugate base after deprotonation, making the imide more acidic.