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Aqueous ions a level chemistry aqa Questions and Answers Aqueous ion formula for Iron (11) and what colour is it [Fe(H2O)6]2+ (aq) green solution Aqueous ion formula for copper (11) what colour is it [Cu(H2O)6]2+ blue solution Aqueous ion Iron (111) and what colour is it [Fe(H2O)6]3+ (aq) purple solution may look yellow-brown due to [Fe(H2O)5(OH)]2+ Aqueous ion Aluminium (111) and what colour is it [Al(H2O)6]3+(aq) colourless solution Iron (11) aqueous ion plus N...

AQA A-level Chemistry Topic 1.4 - TOF Mass Spectrometry Questions and Answers What are the two types of ionisation for a mass spectrometer? Electron impact Electrospray ionisation Describe the stages of electron impact. 1. High energy electrons are fired at the sample using an electron gun. 2. This knocks off an electron from each atom/molecule to form 1+ ions. Describe the stages of electrospray ionisation. 1. The sample is dissolved in a volatile solvent (e.g. methanol or w...

OCR A-Level Chemistry Chapter 7 – Periodicity Questions and Answers Atomic Number Factor by which elements are arranged from left to right along periodic table Group Vertical column containing elements with the same number of outer shell electrons and similar properties Period Horizontal row by which it's number is the number of the highest energy shell of elements within that row Mendeleev Father of the modern periodic table Periodicity Repeating trends in...

A Level Chemistry common ion Questions and Answers hydrogen H⁺ lithium Li⁺ sodium Na⁺ potassium K⁺ magnesium Mg²⁺ calcium Ca²⁺ barium Ba²⁺ aluminium Al³⁺ fluoride F⁻ chloride Cl⁻ bromide Br⁻ iodide I⁻ oxide O²⁻ sulfide S²⁻ silver Ag⁺ zinc Zn²⁺ copper (I) Cu⁺ copper (II) Cu²⁺ chromium (II) Cr²⁺ chr...

AQA A Level Chemistry Year 2 - Rate Equations Questions and Answers From what time is the initial rate of reaction measured? t=0 What is a rate equation? An expression showing how the rate of reactions is linked to the concentration of the reactants What is the rate equation for the reaction : A + B --> C Rate = k[A]^m[B]^n The product concentrations are included in the rate equation True or False False What is the order of reaction with respect to a particu...

AQA A-level Chemistry Paper 1 Questions and Answers Explain what is meant by the term co-ordinate bond a covalent bond in which both electrons are donated by one atom Define the term Ligand Atom, ion or molecule which can donate a pair of electrons to a metal ion What can lattice enthalpy defined as? (2 things) Lattice enthalpy of formation and lattice enthalpy of dissociation Why is the experimental value for lattice dissociation of some compounds greater than the theor...

AQA A-Level Chemistry - Carboxylic Acids and Derivatives Questions and Answers Carboxyl group -COOH Naming Carboxylic Acids - Suffix (-oic acid) always at end of name, and chain - Numbering of carbons always starts at COOH end - Suffix (-dioic acid) implies carboxylic acid groups on both ends Acidity of Carboxylic Acids - Weak acids in water - slightly dissociate - Strong enough to displace CO2 from carbonates - E.g. CH3CO2H(aq) ⇌ CH3CO2-(aq)+ H+(aq) Solubility of...

Topic1. Excel Chemistry A level Questions and answers What is the relative mass of protons, neutrons and electrons? Protons: 1 Neutrons: 1 Electrons: 1/1840 What is the relative charge of protons, neutrons and electrons? Protons: +1 Neutrons: 0 Electrons: -1 What is atomic number? -The number of protons in the nucleus of an atom of an element. -All atoms of the same element have the same number of protons. What is the mass number? The total number of protons and ne...

AQA A Level Chemistry Year 1 – Alkanes Questions and Answers What is a source of hydrocarbons? Crude oil (petroleum) What is crude oil (petroleum) ? A mixture consisting mainly of alkane hydrocarbons which can be separated by fractional distillation How might blockage of the air vents in a combustion engine affect its performance? Less energy given out by the fuel Engine less powerful/efficient What is fractional distillation? The continual evaporation and condensati...

A-Level Chemistry Paper 1 Definitions Questions and Answers correct Ionic bonding The electrostatic attraction between positive and negative ions Covalent bonding The strong electrostatic force of attraction between a shared pair of electrons and the nuclei of the bonded atoms Dative bonding Where the shared pair of electrons is supplied by one of the atoms only Electronegativity The ability of an atom to attract the bonding electrons in a covalent bond Hydrogen ...

AQA A-level chemistry chemical tests Questions and Answers What is the process for purifying an organic liquid (recrystallisation)? Dissolve impure compound in minimum volume of hot solvent Hot filter solution through (fluted) filter paper quickly Cool the filtered solution by inserting beaker in ice Suction filtrate with a Buchner flask to separate out crystals Wash the crystals with distilled water Dry the crystals between absorbent layer What is the purpose of using the minimum vo...

A-Level Chemistry Paper 1 Definitions Questions and Answers Orbital A region around the nucleus that can hold up to two electrons with opposite spins First Ionisation Energy The energy required to remove 1 mole of electrons from 1 mole of gaseous atoms Ionic bonding The electrostatic attraction between positive and negative ions Covalent bonding The strong electrostatic force of attraction between a shared pair of electrons and the nuclei of the bonded atoms Dati...

AS Level Chemistry Questions and Answers Atomic number Number of protons in an element Mass number Number of protons and neutrons Ion Electrically charged particle formed by the loss/gain of electrons Relative masses of P,N and E 1,1, 1/2000 (respectively) Isotopes Atoms of the same element with different number of neutrons but same number of protons. What are steps of mass spectroscopy? Ionisation, Acceleration, Deflection, Detecting Ionisation ...

AQA A LEVEL Chemistry Questions and Answers Relative atomic mass The average mass of an atom of an element, relative to 1/12th of the mass of an atom of Carbon-12 Relative molecular mass Average mass of a molecule compared to 1/12th of the mass of a carbon-12 atom The Avogradro constant the number of particles in a mole ideal gas equation pV = nRT empirical formula the simplest whole number ratio of atoms of each element in a compound percentage atom econ...

Exam (elaborations) Bio 255 Lab week 5 tests Questions and Answers Exam (elaborations) Exam 3 Bios 255 Questions and Answers Exam (elaborations) Bio 255 exam 2 Questions and Answers Exam (elaborations) BIO 255- TEST 2 Questions and Answers Exam (elaborations) Bio 255 Lab Week 3 Questions and Answers Exam (elaborations) Anatomy & Physiolo

Bio 255 Lab week 5 tests Questions and Answers shoulder bone clavicle upper arm bone humerus thumb side lower arm bone radius pinky side (longer) lower arm bone ulna wrist bone carpals finger bones phalanges on hand ankle bone tarsal toe bones phalanges on foot back of shoulder bone scapula butt bones os coxae upper leg bone clavicle larger lower leg bone tibia smaller lower leg bone fibula w...

Exam 3 Bios 255 Questions and Answers What is the function of the immune reproductive system protects body from infection and fights of pathogen what are the two major defense of immune adaptive and innate non-specific immunity general mechanisms that defend the body against foreign invaders. YOU ARE BORN WITH IT First line of defense skin, mucous membrane, sebum internal defenses: second line of defense inflammation interferon compliment fever phagocytosis ...

Bio 255 exam 2 Questions and Answers The place where two bones meet is called ______. articulation Growth from within cartilage is called ______. interstitial growth Cartilage is what type of tissue? connective In interstitial growth of cartilage ______. news cells and new matrix are produced Chondrocytes occupy small spaces called lacunae Which statements characterize cartilage? It supports soft tissues It provides a gliding surface at joints. It prov...

BIO 255- TEST 2 Questions and Answers Which of the following best describes the direction and function of efferent signals? -away from CNS to cause effect on glands, muscle efferent nervous system somatic sympathetic parasympathetic Autonomic nervous system Parasympathetic pathways Sympathetic pathways Adrenal sympathetic pathways ganglion A location outside of the central nervous system where autonomic signals can synapse -cluster preganglionic autonomic ne...

Bio 255 Lab Week 3 Questions and Answers areolar connective tissue Binds and cushions organs and skin By volume, mostly viscous ground substance Elastic properties from loosely organized protein fibers Highly vascularized adipose tissue Stores triglycerides for a future source of energy (fat cells) Insulation, protects vital organs Only connective tissue with more cells than matrix reticular connective tissue Reticular fibers provide framework (stroma) of organs Found in ...