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A weak acid such as carbonic acid is sufficient for this reaction: 3 K 2 MnO 4 + 2 CO 2 2 KMnO 4 + 2 K 2 CO 3 + MnO 2 {\displaystyle {\ce {3 K2MnO4 + 2 CO2 -> 2 KMnO4 + 2 K2CO3 + MnO2}}} Permanganate salts may also be generated by treating a solution of Mn 2+ ions with strong oxidants such as lead dioxide (PbO 2 ), sodium bismuthate (NaBiO 3 ...
This sodium hydroxide solution can be used to measure the equivalent weight of an unknown acid. For example, if it takes 13.20±0.03 cm 3 of the sodium hydroxide solution to neutralise 61.3±0.1 mg of an unknown acid, the equivalent weight of the acid is:
An equivalent (symbol: officially equiv; [1] unofficially but often Eq [2]) is the amount of a substance that reacts with (or is equivalent to) an arbitrary amount (typically one mole) of another substance in a given chemical reaction. It is an archaic quantity that was used in chemistry and the biological sciences (see Equivalent weight § In ...
Normality can be used for acid-base titrations. For example, sulfuric acid (H 2 SO 4) is a diprotic acid. Since only 0.5 mol of H 2 SO 4 are needed to neutralize 1 mol of OH −, the equivalence factor is: f eq (H 2 SO 4) = 0.5. If the concentration of a sulfuric acid solution is c(H 2 SO 4) = 1 mol/L, then its normality is 2 N. It can also be ...
This page was last edited on 8 January 2022, at 11:37 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may ...
Molecular weight (M.W.) (for molecular compounds) and formula weight (F.W.) (for non-molecular compounds), are older terms for what is now more correctly called the relative molar mass (M r). [8] This is a dimensionless quantity (i.e., a pure number, without units) equal to the molar mass divided by the molar mass constant .
Research shows that up to 60% of the weight loss from prescription medications may come from lean body mass. Muscle loss can affect strength and mobility, so eating enough protein to preserve lean ...
Manganate is formally the conjugate base of hypothetical manganic acid H 2 MnO 4, which cannot be formed because of its rapid disproportionation. However, its second acid dissociation constant has been estimated by pulse radiolysis techniques: [3] HMnO − 4 ⇌ MnO 2− 4 + H + pK a = 7.4 ± 0.1