Chemistry Ka question? 1. This acid is diprotic (readily ionizes two protons), not triprotic as might be suggested by this formula. What is the ... A: Ka of HClO is given as 4 x 10-8. It is a diprotic acid, the hydrogenphosphite ion, HP(O)2(OH)− is a weak acid: The conjugate base HP(O)2(OH)− is called hydrogen phosphite, and the second conjugate base, HPO2−3, is the phosphite ion. Orthophosphorous acid Acid with values less than one are considered weak. IUPAC recommends that the latter be called phosphorous acid, whereas the dihydroxy form is called phosphonic acid. The hydrogen atom bonded directly to the phosphorus atom is not readily ionizable. Contact may severely irritate skin, eyes, and mucous membranes. Phosphorous acid is the compound described by the formula H3PO3. 7.1x10-3. From this experimental data we can see that H3PO3 is more acidic. If the freezing point of the solution was incorrectly read 0.5oC lower than the true freezing... A: The magnitude of the freezing point depression produced by a solute is found to be proportional to i... A: Given chemical reaction: Contains 15 elect... A: The atomic number of an element is the number of protons in the nucleus of an atom or it is the numb... Q: Hello, Choosing an acid or base where pK a is close to the pH needed gives the best results. This nomenclature is commonly reserved for substituted derivatives, that is, organic group bonded to phosphorus, not simply an ester. Ammonia NH 3 1.8×10-5 Aniline C 6H 5NH 2 4.3×10-10 Codeine C 18H 21NO 3 1.6×10-6 Diethylamine (C 2H 5) 2NH 6.9×10-4 Dimethlyamine (CH 3) 2NH 5.4×10-4 Ethylamine C 2H 5NH 2 6.4×10-4 Ethylenediamine NH 2C 2H 4NH 2 5.2 10-4 "Phosphonic acid" redirects here. Therefore, I know the acid will domimate the equation, but I … Q: NH3 is a weak base (Kb=1.8×10−5Kb=1.8×10−5) and so the salt NH4Cl acts as a weak acid. They are oxidized to phosphoric acid or its salts. 9 years ago. Phosphorous acid appears as a white or yellow crystalline solid (melting point 70.1 deg C) or a solution of the solid. The pKa value measures the acidity of a solution based on how the hydrogen ions of the acid dissociate when added to an aqueous solution. Other important oxyacids of phosphorus are phosphoric acid (H3PO4) and hypophosphorous acid (H3PO2). Answer Save. Trevor H. Lv 7. You do not get an H3PO3- ion . Based on the Ka and its relationship with Kw, what is the value of Kb? Find answers to questions asked by student like you. Ferrous materials, including steel, may be somewhat protected by promoting oxidation ("rust") and then converting the oxidation to a metalophosphate by using phosphoric acid and further protected by surface coating. Organic derivatives of phosphorous acid, compounds with the formula RPO3H2, are called phosphonic acids. 2) What is the pH of a 1.6 M solution of Na 3 PO 4?In this solution, what are the concentrations of HPO 4 2-, H 2 PO 4-, and H 3 PO 4?. The ammonium ion is the co... Q: Write the complete symbol, including mass number and atomic number, for each atom? Phosphorous acid slowly oxidizes in air to phosphoric acid.. What is the p... Q: HClO is a weak acid (Ka=4.0×10−8Ka=4.0×10−8) and so the salt NaClO acts as a weak base. Calculate a value for the [H2PO3 – ] in a 0.500 molar solution of H3PO3. Experts are waiting 24/7 to provide step-by-step solutions in as fast as 30 minutes!*. For H3PO3, Ka1= 1.0x10^-2 and Ka2= 2.6x10^-7. Relevance. Favorite Answer. Solution for . It is also used as a strong reducing agent and in the production of phosphorous acid, synthetic fibres, organophosphorus pesticides, and the highly efficient water treatment agent ATMP. 1 Answer. Approximate values areKa1 = 7x10^-3; Ka2 = 6x10^-8 and Ka3 = 4.5x10^-13 Solution for . There are... Q: the henry's law constant for N2 in water at 53 C is 8.4*10^-7M/mmHg and the vapor pressure of water ... A: The Henry’s Law states that the mass of a gas dissolved by a solvent is directly related to the pres... *Response times vary by subject and question complexity. Strong acids are listed at the top left hand corner of the table and have Ka values >1 2. This reaction is used for laboratory-scale preparations of PH3. 3. The strong bases are listed at the bottom right of the table and get weaker as we move to the top of the table. (See: Passivation (chemistry)). Phosphorous acid is an intermediate in the preparation of other phosphorus compounds. What is the value for the [H3PO3-] in a .500 molar solution of H3PO3? This species exists in equilibrium with an extremely minor tautomer P(OH)3. Since H3PO4 has 3 ionizable hydrogens, it will have three Ka values. The Ka of an acid is 1.3 mc020-1.jpg 10-7. Both phosphorous acid and its deprotonated forms are good reducing agents, although not necessarily quick to react. H3PO3 is more clearly described with the structural formula HPO(OH)2. For H3PO3, Ka1 = 1.0 × 10-2 and Ka2 = 2.6 × 10–7 . Median response time is 34 minutes and may be longer for new subjects. A: Ammonium chloride dissociates completely into ammonium and chloride ions. Phosphorous acid is an intermediate in the preparation of other phosphorus compounds. Name Formula Ka (or Ka1) Ka2 Ka3 Acetic HC2H3O2 1.8 x 10 –5 Arsenic H3AsO4 5.8 x 10 –3 1.1 x 10–7 3.2 x 10–12 Arsenous H3AsO3 5.1 x 10 –10 Ascorbic H2C6H6O6 8.0 x 10 –5 1.6 x 10–12 Benzoic HC7H5O2 6.5 x 10 –5 Boric H3BO3 5.8 x 10 –10 1.8 x 10–13 1.6 x 10–14 Butanoic HC4H7O2 1.5 x 10 –5 1) Phosphorous acid, H 3 PO 3, is actually a diprotic acid for which Ka 1 = 5.0 × 10-2 and Ka 2 = 2.0 × 10-7.What are the values of [H +], [H 2 PO 3-], and [HPO 3 2-] in a 6.0 M solution of H 3 PO 3?What is the pH of the solution? Dihydroxy(oxo)-λ5-phosphane Chemistry examinations often test students' appreciation of the fact that not all three hydrogen atoms are acidic under aqueous conditions, in contrast with H3PO4. Average rate of reaction is given by: Q: Strike anywhere matches contain the compound tetraphosphorus trisulfide, which burns to form tetraph... A: The equation for the reaction is: For H3PO3, Ka1 = 1.0 × 10-2 and Ka2 = 2.6 × 10–7 . Answer Save. Calculate a value for the [H2PO3 – ] in a 0.500 molar solution of H3PO3. The IUPAC (mostly organic) name is phosphonic acid. Dihydroxy-λ5-phosphanone On the other hand, H3PO4 is triprotic, all hydrogens bonded to oxygens.