Phenolphthalein - Study guides, Class notes & Summaries

CHEMISTRY PRAXIS Practice Exam Questions And Answers (Updated And Verified) What is the negative log of 1 X10⁻⁷ - answer7 When [H₃O⁺] = [OH⁻] the solution is acidic or basic or neutral - answerneutral The concentration of H₃O⁺ and OH⁻ in pure water at 25°C - answer1X10⁻⁷ Kw - answer1X10⁻¹⁴ pH + pOH = - answer14 What is the concentration of Hydrogen ion when the pH is 2 - answer1X10⁻² Using the - log [H⁺] or - log [H₃O⁺] helps you find the - answerpH U...

Boiler water is treated in order to prevent a) sludge, mud, pitting, corrosion b) foaming, corrosion, carryover, sludge c) sludge, corrosion, scale, carryover d) scale, sludge, mud, pitting e) foaming, carryover, pitting, corrosion - CORRECT ANSWER c Dissolved solids in raw water a) cause pitting of boiler surfaces b) cause grooving of piping surfaces c) are organic matter d) cannot be removed with filters e) cause corrosion of boiler surfaces - CORRECT ANSWER d B...

PAPER 1 CHEMISTRY QUESTIONS AND CORRECT ANSWERS (graded A+} they are all soluble - correct answer-What is true about common sodium, potassium and ammonium salts? hydrogen ions - correct answer-What are acids in solution a source of? hydroxide - correct answer-What are alkalis in solution a source of? 7 - correct answer-What is the pH of a neutral solution? low (less than 7) - correct answer-Do acidic solutions have high or low pH values? high (greater than 7) - correct answer-Do alka...

CHEM 104 Final Exam; Questions and Answers 100% Solved In this experiment scrap aluminum metal will be converted to the compound called ___.the name commonly refers to _____________, which is a crystaline white solid. Correct answer-alum; potassium aluminum dodecahydrate is the process of determining the exact concentration (molarity) of a solution Correct answer-standardization is one type of analytical procedure often used in standarization. in a this, an exact volume of one substa...

AS level OCR Chemistry Exam Questions And Answers (Verified And Updated) Isotopes - answerDifferent atomic forms of the same element. Atoms with the same number of protons but a different number of neutrons Relative atomic mass - answerThe mean mass of an atom of an element, compared to 1/12th of the mass of an atom of carbon-12 Concentration= - answerNumber of moles ÷ Volume One mole - answer6.02×10^23 Number of moles= - answermass ÷ molar mass r.t.p - answer25 ºC 100 kPa (1 atm) ...

AS level OCR Chemistry Exam Questions And Answers (Verified And Updated) Isotopes - answerDifferent atomic forms of the same element. Atoms with the same number of protons but a different number of neutrons Relative atomic mass - answerThe mean mass of an atom of an element, compared to 1/12th of the mass of an atom of carbon-12 Concentration= - answerNumber of moles ÷ Volume One mole - answer6.02×10^23 Number of moles= - answermass ÷ molar mass r.t.p - answer25 ºC 100 kPa (1 atm) ...

History of the atom correct answersSolid sphere Johnson - Plum pudding (-ve electrons) Rutherford - fired alpha particles at thin gold sheet, a few were deflected backwards - tiny +ve nucleus, surrounded by cloud of -ve electrons Electrons in shells/ energy levels Percentage yield equation correct answersactual yield/theoretical yield x 100 Making new concentrations equation correct answersvol to use = final conc/initial conc x vol required Acid-alkali titrations correct answersUse p...

Bronsted-Lowry acid - ANSWER a proton donor. Bronsted-Lowry base - ANSWER proton acceptor What is H3O+? - ANSWER hydronium ion definition of pH - ANSWER -log10[H+] How do you get [H+] from ph? - ANSWER 10^(-pH) the ionic product of water - ANSWER [OH-][H+] Is dissociation an endo or exothermic reaction? - ANSWER endothermic Why is the concentration of water not included in Kw? - ANSWER The concentration of water is so large and constant the equilibrium equation can be simplified How do...

A complete list of the products of cellular respiration: - ️️CO2, H2O and energy. A metabolic process by which cells secure energy from various compounds is - ️️Cellular respiration. Which process is the most efficient? - ️️Cellular respiration. A pathway used by animal cells in oxygen deficient conditions is - ️️lactate fermentation. What is the pH indicator we will use in this experiment? - ️️phenolphthalein A complete list of reactants in cellular respiratio...

Acids And Bases Lab Study Guide Test 2024. what are acids and bases according to the bronsted lowry theorem - correct answer acids are hydrogen ion donors, bases are hydrogen ion acceptors. what does the bronsted lowry theorem state - correct answer each acid has corresponding base, called the conjugate base, that is formed when acid loses hydrogen ion. what is the equation for the bronsted lowry theorem - correct answer HA + H₂O → H₃O⁺ + A⁻ acid ← hydronium conjugate base ...