What are acid and basic radicals?
Acid radical is substance left out without hydrogen which is generally a non metal or anion.See an example HCl if we separate this two we will get H+ and Cl- this Cl- is our acid radical.And basic radical is substance left out without a hydroxide ion which is generally a metal or cation.See an example NaOH if we disassociate them we will get Na+and OH- here Na+ is the basic radical .And salt is formed always of this basic and acidic radical.Ex - NaCl.
Acidic, Neutral, or Basic Salts?
Conjugated acids and bases of strong bases and acids, respectively, are weak acids and bases. In easier words, the conjugate acid of a strong base is a weak acid and the conjugated base of a strong acid is a weak base. On the other head, the conjugated acid of a weak base is a stronger acid and same holds true for a weak acid. Acidity, neutrality, and basicity are measured in the pH scale, which is the negative log of the concentration of [H+] within the solutions. Acidity implies that the pH is between 0 and 7, neutral is at 7, and finally, basicity means that the pH is between 7 and 14. In order to determine whether salts are acidic, neutral, or basic, you'd have to look at the solution they form when they are desolved in water. 1. NH4Br --> NH4 + Br - a. since Br - is the conjugate base for HBr (strong acid), therefore it is a weak base and it doesnt alter the pH of the solution. b. NH4 is the conjugate acid of NH3 (weak base) therefore it is a stronger acid, so it decreases the pH of the solution. c. NH4Br is an acidic salt 2. KCN a. K+ is conjugate acid of KOH (strong base --> weak conjugate acid --> no effect on the pH b. CN- is conjugate base of HCN (weak acid --> strong conjugate base --> increases pH) c. KCH is a basic salt 3. NH4CN a. NH4+ is conjugate acid of HN3 (weak base --> strong conjugate acid --> decrease pH) b. CN- is conjugate base of HCN (weak acid --> strong conjugate base --> increases pH) c. since you cant qualitatively decide which has a stronger effect, you have to look up the pKa values of these ions. The one with a larger pKa value takes the more effect. following these rules...you should be able to figure out the rest... 4. neutral 5. acidic 6. basic 7. neutral
How do acidic and basic amino acids differ?
Three amino acids have basic “R groups” at neutral pH. Arginine, lysine, and histidine. Their groups contain nitrogen and resemble ammonia, which is a base. Their pKa's (the logarithmic acid dissociation constant) are high enough that they tend to bind protons, gaining a positive charge.Two amino acids have acidic “R groups” at neutral pH. These are aspartic acid or aspartate (Asp) and glutamic acid or glutamate (Glu). Their groups have carboxylic acid groups whose pKa's are low enough to lose protons, becoming negatively charged.
How do we know if an oxide is amphoteric, basic or acidic?
I am writing this answer hoping you know how the modern periodic table is. Generally, it is most accepted that metallic oxides are basic and non-metallic oxides are acidic. The oxides formed by group 1 and 2 elements are all basic oxides, primarily because the elements of these groups are metals. The oxides formed my elements of group 14 and after are acidic or neutral. Ex - CO2 is acidic whereas CO is neutral. The oxides formed my Aluminium and Zinc are amphoteric oxides, meaning they act like bases to acids and like acids to bases. Thus, based on which element’s oxide, we can say whether it is acidic, basic or amphoteric.
How can I know whether an oxide is basic or acidic from the chemical Formula?
Oxides of the two first columns of the peridic table will give a basic solution when they react with water. These columns are called the alkali metals and the alkali earth metals. Alkali means basic. Essentially, these oxides are soluble and dissociate into the metal ion, which does not undergo hydrolysis, and the oxide anion, which is a strong base and undergoes hydrolysis.For exampleNa2O (s)→ 2Na+(aq) + O2-(aq)O2- (aq)+ H2O→ 2 OH-(aq)Oxides of the non metals will produce acidic solutions. They first bond with water, then the resulting product happens to be an acid.CO2 + H2O→ H2CO3Oxides of metals outside of the first two columns are less easily predicted in terms of the acidity/alkalinity. They can dissotiate and release basic O2-, but the cations can complex with water and produce acids.Fe3+ + 6H2O → Fe(H2O)6 which is an acid.These reactions counteract each other and you need to know more about the specific species to determine if you will have an acidic or basic solution.
What is the basic nature of rubidium oxide?
Generally speaking metals form BASIC oxides and non-metals form ACIDIC oxides. Basic oxides all react with acids to make salts and water. Some basic oxides dissolve in water to make alkalis. Acidic oxides all react with alkalis to form salts and water. Some acidic oxides dissolve in water to make acids. Examples. Rb2O + H2O --> 2 RbOH an alkali Rb2O + 2HCl --> 2 RbCl + H2O basic oxide and acid P4O6 + 6H2O --> 4 H3PO3 an acid P4O6 + 12NaOH --> 4 Na3PO3 + 6H2O acidic oxide and alkali
What is used to test whether a substance is acidic or basic?
Litmus paper, pH paper, indicators and pH meter can be used to test whether a substance is acidic or basic.Litmus paper is used to determine whether an aqueous solution is acidic (pH<7.0) or basic/alkaline (pH>7.0) in nature.Blue litmus paper turns to red in acidic medium (pH<7.0).Red litmus paper turns to blue in alkaline/basic medium (pH>7.0).No change in color of litmus paper is seen at neutral pH (pH 7.0).2. Various Indicators or dyes such as phenol- phthalein, topfer’s indicator, phenol red, methyl orange, thymol blue, bromophenol blue, etc. are used to find out acidic pH or basic/alkaline pH. The indicators show different colors in acidic and basic media, e.g. methyl orange and topfer’s indicator turn red in acidic medium and phenolphthalein turns pink in alkaline medium.3. pH paper strips are used to determine pH. A drop of solution is kept on the pH paper strip and the color developed on the strip is matched with the provided standard color-pH chart to find out the pH. Although determination of pH by this method is easy and quick, but not accurate. It gives fairly accurate value.Electronic (Digital) pH meter is used for accurate measurement of pH. The basic components of an electronic pH meter are indicator electrode (special glass electrode sensitive to H+), a reference (or calomel) electrode and potentiometer.
Is water an acid or base?
Why does water shows properties of both acid and base? For this we need to know first what water is…Water is a molecule that is covalently bonded between two different species that are OH- aand H+.Now lets see what an acid is.. ANY species having a H+ (Cation of hydrogen) is called acid.What a base is.. ANY species having an OH- (anion of hydroxide) is called a base.Now you can know why Water has both acidic and basic properties. Because it has both H+ and OH-.Whenever Water reacts with an acid, its OH- part takes an action and water behaves as a base while when it meets a base, its H+ does the work and now water behaves as an acid. That’s why it is also called Amphoteric.Water knows how to deal with both.. Pretty clever it is…I hope that answers to your question.
The formula MgCl2(aq) is a substance that is : acidic, basic, neutral, both acidic and basic?
salts are produced from the reaction of acids and bases to form salt and water there are different combination you can think of Strong Acid + Strong base = neutral salt Strong Acid + weak base = acidic salt weak acid + strong base = basic salt weak acid + weak base = "more complicated to determine" for this case MgCl2 came from Mg(OH)2 and HCl , just put the right number of OH on the cation for the base and H for the anion. Mg(OH)2 is not a strong base HCl is a strong acid therefore the salt produce should be slightly acidic or acidic how do you know which are the strong acids? there are 6 common strong acid in inorganic chemistry, these are HCl, HBr, HI, HNO3, H2SO4, HClO4 others not included here are considered weak..yes HF and acetic acid are weak acids strong bases are LiOH, KOH, NaOH, Ca(OH)2, Sr(OH)2, Ba(OH)2 others not included here are considered weak such as NH3, Mg(OH)2