Ionic strength Study guides, Class notes & Summaries

IB Chemistry Topic 5 Latest Update Graded A+ Enthalpy The amount of heat released (exothermic) or absorbed (endothermic) during a chemical reaction (the energy needed for the reaction to occur) This can be lowered with the presence of a catalyst. Change in Enthalpy Hproducts -Hreactants Specific heat equation c= q in Joules (or Change in H)/mass(g)(change in temp) Specific heat of water 4.18 J/gdegreesC **NOTE: Usually in kJ Endothermic v. Exothermic Endothermic: Absorbing e...

AQA GCSE Chemistry Exam Questions With 100% Correct Answers What is a compound? - answerwhen two or more elements react together What is an atoms? - answerthe smallest part of an element that can still be recognised as that element What is a molecule? - answerwhen atoms join together by chemical bonds What is an ion? - answera charged particle produced by the loss or gain of electrons How do the atoms of elements gain stable electronic structures? - answerjoining together by sharing elec...

NUR 231 Exam S2 2024 Questions With 100% Correct Answers Most drugs are chemically modified in the body. Which organ is the major site of drug metabolism? A. Stomach B. Lungs C. Liver D. Kidney C. Liver Which chemical bond is the weakest? A. Non-polar covalent bond B. Ionic bond C. Polar covalent bond D. Hydrogen bond D. Hydrogen A 55 year-old male with a 30year history of smoking is examined for respiratory disturbance. Examination of his airway (bronchial) reveals that...

Lattice energy - - The enthalpy change when 1 mole of ionic compound is formed from its gaseous ions under standard conditions - It is the energy given out when ions of opposite charges comes together to form an ionic lattice Lattice energy is endothermic or exothermic? - - It is always exothermic because bonds are being formed (ionic bond) between oppositely charged ions, not broken Equation showing the formation of NaCl lattice - - Na^+(g) + Cl^-(g) > NaCl(s) The state of the opposite...

NUR 231 Exam S2 2024 Questions With 100% Correct Answers Most drugs are chemically modified in the body. Which organ is the major site of drug metabolism? A. Stomach B. Lungs C. Liver D. Kidney C. Liver Which chemical bond is the weakest? A. Non-polar covalent bond B. Ionic bond C. Polar covalent bond D. Hydrogen bond D. Hydrogen A 55 year-old male with a 30year history of smoking is examined for respiratory disturbance. Examination of his airway (bronchial) reveals that...

METALLURGY TEST 1 EXAM 2024 WITH 100% ACCURATE SOLUTIONS Materials with this type of bonding can exhibit both high strength and high ductility - correct answer metallic materials with this type of bonding have valence electrons that are free to wander throughout the structure (high conductivity) - correct answer metallic this type of bonding is considered the weakest of the four types listed below - correct answer vander waals bonds of this type tend to be "directional' and the lim...

Chem 162 Final Exam Questions and Answers Latest Updated 2024/2025 (Graded A+) Chemistry definition correct answers Study of structure, properties, transformations of matter Matter correct answers Anything that has mass + takes up space Phases: solid, liquid, gas Condensed phases = solids + liquids Intermolecular Forces (IMF) correct answers = Interactions between molecules/atoms/ions Solution correct answers = Homogenous mixtures of 2+ pure substances In a solution, the solute is disperse...

PHARMACEUTICAL DOSAGE Exam Questions and Answers Latest Update 2023/2024 Rated A+. 1.Solution which has the same osmotic pressure and pH as human fluid is: a.Saturated b. Hypertonic c. Isotonic d. Hypotonic 2.Acacia reproduces color with some substance due to the presence of a. Peroxidase b. Acid c. Impurities d. Any of the above 3.Spirit of peppermint is prepared by: a.Simple solution b. Chemical reaction c. Distillation d. Solution with maceration 4.Brandy is made from: a.Molasses b...

PHARMACEUTICAL DOSAGE Exam Questions and Answers Latest Update 2023/2024 Rated A+. 1.Solution which has the same osmotic pressure and pH as human fluid is: a.Saturated b. Hypertonic c. Isotonic d. Hypotonic 2.Acacia reproduces color with some substance due to the presence of a. Peroxidase b. Acid c. Impurities d. Any of the above 3.Spirit of peppermint is prepared by: a.Simple solution b. Chemical reaction c. Distillation d. Solution with maceration 4.Brandy is made from: a.Molasses b...

What is the principal form of benzoic acid at pH 8.2 if the pKa value is 4.2 correct answer: So, at pH 4.20, there is a 1:1 mixture of benzoic acid (HA) and benzoate ion (A-). At pH = pKa + 1 (= 5.20), the quotient [A-]/[HA] is 10:1. At pKa + 2 (= 6.20), the quotient [A-]/[HA] is 100:1. As pH increases, all the way to pKa + 4 the [A-]/[HA] is 10000:1 *The predominant form of benzoic acid at pH 8 is the benzoate anion For a monoprotic system, the species ___ is the predominant form when ...