The predominant species refers to which side of an acid/base equilibrium equation is favored in a particular solution, i.e. whether a solution will have more [HA] or [A-] (which can also be referred to as a neutral and charged species, respectively).
What is the meaning of the word predominant?
Definition of predominant 1 : having superior strength, influence, or authority : prevailing 2 : being most frequent or common Synonyms & Antonyms Choose the Right Synonym Predominant vs. Predominate Example Sentences Learn More About predominant
What is predominance diagram in chemistry?
Predominance diagram. A predominance diagram purports to show the conditions of concentration and pH where a chemical species has the highest concentration in solutions in which there are multiple acid-base equilibria. The lines on a predominance diagram indicate where adjacent species have the same concentration.
What is the difference between predominantly and predominately in writing?
As an adjective predominate is somewhat more likely to turn up in technical writing than in general writing. The adverbs predominantly and predominately are a more even match in frequency than their base adjectives are, although predominantly is still significantly more common than predominately. Religion is the predominant theme of the play.
What is the meaning of predominate in art?
to appear more noticeable or imposing than something else: Blues and greens predominated in the painting. verb (used with object), pre·dom·i·nat·ed, pre·dom·i·nat·ing. to dominate or prevail over. OTHER WORDS FOR predominate
What is a predominant species in solution?
As additional strong acid is added to the solution, the formation of excess strong acid causes the pH of the solution to plummet further to the deeply acidic range of pH less than 2. The dominant species in the solution is the excess hydrogen ion, and the pH of the solution is strongly acidic.
How do you identify a predominant species?
4:4720:32Polyprotic Acid-Base Part 1: Dominant Species - YouTubeYouTubeStart of suggested clipEnd of suggested clipThe predominant form is written in the box here. And what you'll notice is that when pka equals phMoreThe predominant form is written in the box here. And what you'll notice is that when pka equals ph we have a line here which indicates that these two species are present in equal concentration.
What are predominant species?
predominant species means has the meaning in the Methodology for Surveying and Mapping of Regional Ecosystems and Vegetation Communities in Queensland (Version 3.2 August 2012) and means a species that contributes most to the overall above-ground biomass of a particular stratum.
How do you know which species predominates at equilibrium?
If K>>1, the reaction is product-favored; product predominates at equilibrium. If K<<1, the reaction is reactant-favored; reactant predominates at equilibrium.
What are Amphiprotic ions?
Molecules or ions which can either donate or accept a proton, depending on their circumstances, are called amphiprotic species. The most important amphiprotic species is water itself. When an acid donates a proton to water, the water molecule is a proton acceptor, and hence a base.
What is pKa and pH?
pKa is the negative value of the logarithm of Ka. pH is the logarithmic value of the inverse of H+ concentration. Indication of Acidity. pKa indicates whether an acid is a strong acid or a weak acid. pH indicates whether a system is acidic or alkaline.
Is pKa constant?
On the other hand, the pKa value is constant for each type of molecule. It is unaffected by concentration. Even a chemical ordinarily considered a base can have a pKa value because the terms "acids" and "bases" simply refer to whether a species will give up protons (acid) or remove them (base).
How do you calculate pH from pKa?
When the moles of base added equals half the total moles of acid, the weak acid and its conjugate base are in equal amounts. The ratio of CB / WA = 1 and according to the HH equation, pH = pKa + log(1) or pH = pKa.
Which side of equilibrium is favored?
lower energyThe side of lower energy is favored at equilibrium. By favored we mean there is a higher concentration. Acid base reactions are reversible and therefore equilibrium reactions.
How do you know which reaction is favored in equilibrium?
SummaryThe equilibrium constant expression is a mathematical relationship that shows how the concentrations of the products vary with the concentration of the reactants.If the value of K is greater than 1, the products in the reaction are favored.
What does it mean when reactants are favored?
Small K < 1 reactants are "favored" The term "favored" means that side of the equation has higher numbers of moles and higher concentrations than the other.
What is dominant species in a community?
Dominant species are the most abundant species in a community, exerting a strong influence over the occurrence and distribution of other species. In contrast, keystone species have effects on communities that far exceed their abundance.
What are dominant plant species in the environment?
In terms of groups of plants, flowering plants are the most dominant (comprising 90% of known species). In all likelihood, the most dominant species on the plant is some species of grass.
What is the importance of dominant species?
Dominant species play a decisive role in regulating species diversity and ecosystem productivity. For example, numerically dominant species in a forest community can decrease species diversity by influencing the establishment of new species (Gilbert et al. 2009; Crutsinger et al. 2010).
What does "predominate" mean?
to surpass others in authority or influence; be preeminent: He predominated in the political scene. to have or exert controlling power (often followed by over): Good sense predominated over the impulse to fight. to appear more noticeable or imposing than something else: Blues and greens predominated in the painting.
Which lines of the architrave and cornice predominate over the vertical lines of the columns?
The horizontal lines of the architrave and cornice predominate over the vertical lines of the columns.
Is "predominant" a verb?
verb (used with object), pre·dom·i·nat·ed, pre·dom·i·nat·ing.
What are some examples of predominant?
Examples of predominant in a Sentence. Religion is the predominant theme of the play. She is predominant among new writers. Recent Examples on the Web Most of those guys would rather jump on the bandwagon of the predominant side of an issue to sustain their popularity.
What does "praedominant" mean in French?
Middle French, from Medieval Latin praedominant-, praedominans, present participle of praedominari to predominate, from Latin prae- + dominari to rule, govern — more at dominate
What is the synonym for "dominant"?
Choose the Right Synonym for predominant. dominant, predominant, paramount, preponderant mean superior to all others in influence or importance. dominant applies to something that is uppermost because ruling or controlling. a dominant social class predominant applies to something that exerts, often temporarily, the most marked influence.
Is "predominate" an adjective?
Predominant and predominate are synonymous adjectives. Predominant is the older and much more common form. A number of handbooks and commentators hold predominate to be a mistake—a few insisting that the word is only a verb. But they are wrong. As an adjective predominate is somewhat more likely to turn up in technical writing than in general writing. The adverbs predominantly and predominately are a more even match in frequency than their base adjectives are, although predominantly is still significantly more common than predominately.
What is the purpose of a predominance diagram?
A predominance diagram purports to show the conditions of concentration and pH where a chemical species has the highest concentration in solutions in which there are multiple acid-base equilibria. The lines on a predominance diagram indicate where adjacent species have the same concentration. Either side of such a line one species or the other predominates, that is, has higher concentration relative to the other species.
What is the relationship between pH and K1?
K1, or pH = log K1. This relationship is independent of pCr, so it requires a vertical line to be drawn on the predominance diagram.
What is the predominant species in the region to the right of the green and blue lines?
The predominance diagram is interpreted as follows. The chromate ion is the predominant species in the region to the right of the green and blue lines. Above pH ~6.75 it is always the predominant species. At pH < 5.89 (pH < p K1) the hydrogen chromate ion is predominant in dilute solution but the dichromate ion is predominant in more concentrated solutions.
What is the predominant species?
The predominant species refers to which side of an acid/base equilibrium equation is favored in a particular solution, i.e. whether a solution will have more [HA] or [A-] (which can also be referred to as a neutral and charged species, respectively). The pKa value is indicative of whether the reactant or product concentration is higher at equilibrium, and can thus be used to determine what the predominant species is. For example, if your pKa is lower than your pH then the predominant species is [A-], and if your pKa is higher than your pH then the predominant species is [HA].
What is the learning outcome for the acid base equilibria?
one of the learning outcomes for the acid base equilibria is "use pKa values to determine the predominant species of a weak acid/weak base in solution". I'm not sure what it is meant by "predominant species" and how this would be determined by the pKa value?
