Ionisation of water - Study guides, Revision notes & Summaries

Chapter4 chemistry Inorganic chemistry with 100% Correct Answers | Verified | Updated What happens when Group 2 metals react ? - answerWhen group 2 metals react they lose 2 ions and have a +2 charge What is the electronic configuration of all group 2 metals - answerAll group w metals end withe S2 What happens to the ionisation energy as move down group 2 metals. - answerAs you move diwn group 2 tye ionisation energy decreases because there is more shielding (from the positive nucleus an...

• • Water is able to act as acid (proton-donor, H+) or base (proton-acceptor), where in equilibrium:  Where simplifying gives:  The equilibrium expression given by:  Due to the low extend of ionisation, the concentrations of the ions are negligible, hence we regard the concentration of water as constant, thus:  Kw is the ionic product of water; value at 298 K: 1.00 × 10-14 mol2 dm-6; is defined as the equilibrium constant for the ionisation of water  Hydro...

Answer all the questions. 1 Which statement describes electronegativity? A A measure of the reactivity of an element. B The ability of an atom to attract an electron to become a 1– ion. C The attraction of a bonded atom for the electrons in a covalent bond. D The attraction of an atom for a lone pair of electrons. Your answer [1] 2 A chlorate(VII) ion has a 1– charge. What is the formula for sodium chlorate(VII)? A NaCl O3 B NaCl O4 C NaCl O7 D NaCl O8 ...

A LEVEL CHEMISTRY WITH VERIFIED QUESTIONS AND ANSWERS Weak acid - an acid that is only slightly ionised/dissociated in aqueous solution Oxidation - loss of electrons Reduction - gain of electrons Ionic bonding - The electrostatic attraction between oppositely charged ions Covalent bonds - sharing of a pair of electrons Electronegativity - the ability of an atom to attract the electrons in a covalent bond Relative atomic mass - The weighted mean mass of an atom of an element ...

2024 Newest |Chemistry exam 1| UPDATE|COMPREHENSIVE FREQUENTLY MOST TESTED QUESTIONS AND VERIFIED ANSWERS|GET IT 100% ACCURATE ionic compound properties - ANSWER-- have a high melting and boiling point - they're solid at room temperature - are hard, but brittle, so they're not malleable or ductile - don't conduct electricity in solid state - are good conductors of electricity in liquid state or when dissolved in water - they vary from very soluble to insoluble in water, they'r...

A-level CHEMIS T RY Paper 1 Inorganic and Physical Chemistry Monday 10 June 2024 Morning Time allowed: 2 hours Materials For this paper you must have: • the Periodic Table/Data Booklet, provided as an insert (enclosed) • a ruler with millimetre measurements • a scientific calculator, which you are expected to use where appropriate. Instructions • Use black ink or black ball-point pen. • Fill in the boxes at the top of this page. • Answer all questions. • ...

Chemistry - Inorganic chemistry with 100% Correct Answers | Verified | Updated What are the rules for working out an oxidation state that you need to remember? - answer1. Monoatomic elements are 0 2.Identical elements are 0 3.H is always 1+ Define oxidation - answerloss of electrons Define reducing agent - answersomething that gives up an electron and itself is oxidized Define reduction - answergain of electrons Define oxidising agent - answer•Readily accept electrons •Substance th...

past papers questions chemistry - November 2020 AS paper 1, 2017 paper 2 A level, paper 1 2019 A level Questions and Answers 100% Pass | Updated 2024 This question is about atomic structure.There is a general trend for an increase in ionisation energy across Period 3. Give one example of an element that deviates from this trend. Explain why this deviation occurs. - Correct Answer ️️ -Aluminium / Al(Outer) electron in (3)p orbital / sub-shell (level) (3p) higher in energy / slightly ...

AS CHEMISTRY Paper 1 Inorganic and Physical Chemistry Time allowed: 1 hour 30 minutes Materials For this paper you must have: • the Periodic Table/Data Sheet, provided as an insert (enclosed) • a ruler with millimetre measurements • a scientific calculator, which you are expected to use where appropriate. Instructions • Use black ink or black ball-point pen. • Fill in the boxes at the top of this page. • Answer all questions. • You must answer the questions in the ...

Module 3 Model Questions And Answers State one benefit of adding chlorine to water (1) - Answer-Kills germs Suggest one possible hazard of adding chlorine to drinking water (1) - Answer-It is toxic Explain the decrease in the atomic radii across the period from Na to Cl (3) - Answer-1) nuclear charge increases 2) electron shielding remains the same 3) greater attraction to nucleus Describe and explain the trend, down the group, in the reactivity of the Group 2 elements with water (5) -...