Potassium hydrogen phthalate (KHPh) is a salt of phthalic acid that can be used in the production of more complex phthalates and it is used as standard substance for lab titrations. Its melting point is 295 ̊C (563 ̊F), density 1.636 g/cm3. Potassium hydrogen phthalate ("KHP") has the molecular formula "C"_8"H"_5"KO"_4 and is known to be a weak acid. [6-9], by measuring the emf of a cell of type A containing 0.05m KH phthalate (SRM 84a) + O.Olm KCl at 25, 40, 45, 50, 55, and 60°C. KHC8H4O4 is a white solid at room temperature. Together with monopotassium phosphate (KH 2 PO 4. I know that once it is dissolved, the potassium and the hydrogen phthalate dissociate, and then the hydrogen forms hydronium ions because it is a week acid. The titration curve in Table 1 shows an example of using KHP to determine NaOH concentration (a process called standardization). Name: Potassium Hydrogen Phthalate. Potassium hydrogen phthalate, KHC8H4O4 (abbreviated KHP), is a non-hygroscopic, crystalline, solid that behaves as a monoprotic acid. KHP is also a useful standard for total organic carbon (TOC) testing. Because of its high purity, you can determine the number of moles of KHP directly from its mass and it is referred to as a primary standard. Dipotassium phthalate. Use appropriate fire suppression agents for adjacent combustible materials or sources of ignition Potassium Hydrogen Phthalate Created by Global Safety Management, Inc. -Tel: 1-813-435-5161 - www.gsmsds.com Extinguishing media Suitable extinguishing agents: If in laboratory setting, follow laboratory fire suppression procedures. Other . When placed in water, "KHP" dissociates completely into the potassium cation "K"^(+) and the hydrogen phthalate anion, "HP^(-). The pKa value is one method used to indicate the strength of an acid. 4409-98-7. (H 2 O) x (x = 0, 3, 6). When KHP and NaOH combine, a positive hydrogen ion leaves the KHC8H4O4 and a negative hydrogen atom leaves the NaOH. The structure of KHP and its pKa value are also shown in Table 1 Potassium hydrogen phthalate CAS 877-24-7 for analysis EMSURE® Reag. HP − + H 2 O ⇌ P 2− + H 3 O + KHP can be used as a buffering agent in combination with hydrochloric acid (HCl) or sodium hydroxide (NaOH) depending on which side of pH 4.0 the buffer is to be. Hydrogen potassium phthalate. Molar Mass: 204.2212. Formula: KHC8H4O4. It was shown to be equivalent to SRM 84a, one of the lots used by Hamer et al. Potassium biphthalate. Business listings of Potassium Hydrogen Phthalate, 877-24-7 manufacturers, suppliers and exporters in Mumbai, पोटेशियम हाइड्रोजन फाथेलेट विक्रेता, मुंबई, Maharashtra along with their contact details & address. See Answer. 2009-05-04 00:26:11. Other . Phthalic acid, monopotassium salt. It was shown to be equivalent to SRM 84a, one of the lots used by Hamer et al. Potassium hydrogen phthalate, often called simply KHP, is an acidic salt compound.It forms white powder, colorless crystals, a colorless solution, and an ionic solid that is the monopotassium salt of phthalic acid.KHP is slightly acidic, and it is often used as a primary standard for acid-base titrations because it is solid and air-stable, making it easy to weigh accurately. It is water soluble and available in high purity. In this experiment you will use the reaction in Equation 3 to determine the molar concentration of the strong base NaOH using the weak, monoprotic acid potassium hydrogen phthalate (KHP), where P-is the phthalate … Potassium hydrogen phthalate, often called simply KHP, is an acidic salt compound. The potassium hydrogen phthalate, SRM 185d, had an assay value of99.99 percent. Potassium hydrogen phthalate Synonyms: Potassium acid phthalate; KHP 877-24-7 KHC8H4O4 204.23 SECTION 4 — FIRST AID MEASURES Call a POISON CENTER or physician if you feel unwell. Potentiometric Titration of the Purity and Dissociation of Potassium Hydrogen Phtalate Jamela Clemente 1. the significant regions (pre-equivalence point, equivalence point and post equivalence point) in the titration curve and relate the characteristics of each region to the pH result The pre-equivalence point, equivalence point and post equivalence point characterize the titration curve. You have a 50 mole tablet of KHP to which you add to 10.0L of pure H20 and allow the system to become fully saturated. Other . Top Answer. (8 points) The solubility of the weak acid potassium hydrogen phthalate (KHP, 204.22 g/mol, pKA= 5.4) s 80.00 g/L in pure water at 293K. They react as bases to neutralize acids. After the dissociation takes place, "HP"^(-) reacts with water to give the hydronium cation, "H"_3^(+)"O", and the phthalate anion, "P"^(2-). Potassium acid phthalate. KHP stands for potassium hydrogen phthalate, which has the chemical formula KHC8H4O4. It may also be possible to boil the water in advance. If 0.235 g of KHP (potassium hydrogen phthalate) require 15.5 mL of NaOH solution to neutralize it, calculate the molarity of the NaOH solution. [6-9], by measuring the emf of a cell of type A containing 0.05m KH phthalate (SRM 84a) + 0.01m KC1 at 25, 40, 45, 50, 55, and 60 °C. If inhaled: Remove victim to fresh air and keep at rest in a position comfortable for breathing. What is the pKa value for potassium hydrogen phthalate? Salts, basic, such as POTASSIUM HYDROGEN OXALATE, are generally soluble in water. Alias: KHP. The potassium hydrogen phthalate, SRM 185d, had an assay value of 99.99 percent. Material Details SRM 84l - Potassium Hydrogen Phthalate Acidimetric Standard, KHP, Potassium Hydrogen Phthalate, Stoichiometry,ASTM C0025, ASTM C0114, ASTM C0169, ASTM C0225, ASTM C0759, ASTM C0799, ASTM D3444, ASTM D3533,ASTM 5904,ASTM D6238,ASTM E0352,ASTM E0353, ASTM E0364,877-24-7 Skin corrosion/irritation : Not classified pH: 4 - 4.02 0.05M solution at 25°C Serious eye damage/irritation : Causes eye irritation. Potassium hydrogen phthalate (#"KHP"#) has the molecular formula #"C"_8"H"_5"KO"_4# and is known to be a weak acid. Ph Eur - Find MSDS or SDS, a COA, data sheets and more information. Structure, properties, spectra, suppliers and links for: Potassium hydrogen oxalate, 127-95-7. I know the concentration of KC8H4O4 is 1.5x10^-2. Dipotassium phosphate (K 2 HPO 4) (also dipotassium hydrogen orthophosphate; potassium phosphate dibasic) is the inorganic compound with the formula K 2 HPO 4. You therefore need phenolphthalein as indicator. Pitzer model parameters and modified Guggenheim equation parameters for dipotassium phthalate (K 2 PH) and potassium hydrogen phthalate (KHPh) were determined from cell potential difference (cpd) measurements on galvanic cells without liquid junction. It forms white powder, colorless crystals, a colorless solution, and an ionic … Other . Mean activity coefficients of these salts in water at 298.15 K were calculated by the Pitzer model and modified Guggenheim equations. Potassium Hydrogen Phthalate (877-24-7) LD50 oral rat ≥ 3200 mg/kg ATE US (oral) 3200 mg/kg bodyweight . "pH" = 3.577 Potassium hydrogen phthalate, or simply "KHP", is actually an acidic salt because its anion, the hydrogen phthalate anion, "HP"^(-), acts as a weak acid in aqueous solution. If in eyes: Rinse cautiously with water for several minutes. It is soluble in water. It forms white powder, colorless crystals, a colorless solution, and an ionic … Potassium hydrogen phthalate (KHP) is a widely used primary standard (functioning as a mono- protic acid) for acid/base titrations. The resulting solutions contain moderate concentrations of hydroxide ions and have pH's greater than 7.0. (H 2 O) x), it is often used … Asked by Wiki User. Phthalic acid dipotassium salt. KHC8H4O4 can be used for pH meter calibration or as a buffer agent. Your KHP is potassium hydrogen phthalate, so I suppose you are trying to standardize sodium hydroxide against a primary standard acid. pH: 4 - 4.02 0.05M solution at 25°C Respiratory or skin sensitisation : Not classified check_circle Expert Answer. Potassium Hydrogen Phthalate (high purity) Phenolphthalein indicator solution 50% NaOH solution 50.00 mL buret Erlenmeyer flasks PROCEDURE *** One week in advance*** You should dry the standard KHP and solid unknown one week in advance. ... pKa at 20°C provides numerical substance information on the dissociation constant in pKa at a temperature of 20°C. The emf at these six temperatures differed on the So when you dissolve the salt in water, you get potassium cations and hydrogen phthalate anions in 1:1 mole ratios. Potassium phthalate. Based on the {eq}\rm{pKa\pm}{/eq} ranges, sodium bisulfite is the best weak acid component for the preparation of buffer with pH 7.0. A 0.05 mol/kg aqueous potassium hydrogen phthalate solution … PART A -- PREPARATION OF 0.1 N SODIUM HYDROXIDE 1. Potassium Hydrogen Phthalate. Potassium Hydrogen Phthalate In Water? Monopotassium phthalate. Wiki User Answered . These two atoms combine with the oxygen from the NaOH to form H2O, which is the chemical formula for water. Di-Potassium phthalate Potassium hydrogen phthalate, often called simply KHP, is an acidic salt compound.
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