Neutralisation reaction - Study guides, Class notes & Summaries

▪ Relative atomic mass - Ans .The weighted mean mass of an atom of an element compared with one-twelfth of the mass of an atom of carbon-12. ▪ Relative isotopic mass - Ans .The mass of an atom of an isotope compared with one-twelfth of the mass of an atom of carbon-12. ▪ empirical formula - Ans .The simplest whole number ratio of atoms of each element present in a compound ▪ molecular formula - Ans .A chemical formula that shows the number and kinds of atoms in a molecule, but...

Chemistry- Acids, Bases, and Buffers Define Acid - correct answer A proton donor. Define Base - correct answer A proton acceptor. Why is H+ a Proton - correct answer Because hydrogen is just one proton and one electron. Take away the electron and you're left with H+. Define Alkali - correct answer A type of base which dissolves in water to form OH- ions (a soluble base). What is a Monobasic Acid and Give an Example of One - correct answer A monobasic acid e.g. HCl is an acid which ...

PAG 3.1 Questions and Answers | Latest Update | 2024/2025 | Already Passed **How can you determine the enthalpy change when neutralising HCl with NaOH?** To determine the enthalpy change of neutralisation, start by placing a polystyrene cup inside a glass beaker. Measure 25 cm3 of 1.0 mol/dm3 hydrochloric acid and 25 cm3 of 1.0 mol/dm3 sodium hydroxide. Record the initial temperature and take readings every minute for 4 minutes. At the 4-minute mark, mix the solutions and continue to me...

▪ How acidic or alkali something is. - Ans .What does the pH scale tell you? ▪ one to six - Ans .What's the pH range for acids? ▪ 7 - Ans .What's the pH of a neutral solution? ▪ Eight to Fourteen - Ans .What's the pH range of an alkali solution? ▪ H+ - Ans .Which ion in an aqueous solution causes acidity? ▪ OH- - Ans .Which ion in an aqueous solution causes alkalinity? ▪ Base + Acid à Salt + Water - Ans .What does BASW stand for? ▪ Metal + Acid à Salt + Hydrogen - Ans...

Ionisation energy trend in Group 2 - Ans .As you go down the group first ionisation energy decreases because: - Although nuclear charge is increasing - The electrons have an extra quantum shell of shielding making them easier to remove - They exist in a higher energy orbital (and/ or a further distance from the nucleus) Reactivity trend in group 2 - Ans .Group 2 elements become more reactive going down a group as the outer two electrons are easier to remove because they have lower first ...

GCSE COMBINED SCIENCE: SYNERGY 8465/3F Foundation Tier Paper 3 Physical Sciences Version: 1.0 Final G/LM/Jun23/E6 8465/3F (JUN2384653F01) GCSE COMBINED SCIENCE: SYNERGY Foundation Tier Paper 3 Physical Sciences Friday 9 June 2023 Afternoon Time allowed: 1 hour 45 minutes Materials For this paper you must have: l a ruler l a protractor l a scientific calculator l the periodic table (enclosed) l the Physics Equations Sheet (enclosed). Instructions l Use black ink or black ball-po...

Thermodynamics question and answers 2023/24 update Question 1. Hesss law is an application of (a) 1st law of Thermodynamics (b) 2nd law of Thermodynamics (c) Entropy change (d) ∆H = ∆U + P∆V. Question 2. 5 mole of an ideal gas expand isothermally and irreversibly from a pressure of 10 atm to 1 atm against a constant external pressure of 1 atm. Wirr at 300 K is: (a) -15.921 kJ (b) -11.224 kJ (c) -110.83 kJ (d) None of these Question 3. At absolute zero the entropy of a perf...

Thermodynamics question and answers 2023/24 update Question 1. Hesss law is an application of (a) 1st law of Thermodynamics (b) 2nd law of Thermodynamics (c) Entropy change (d) ∆H = ∆U + P∆V. Question 2. 5 mole of an ideal gas expand isothermally and irreversibly from a pressure of 10 atm to 1 atm against a constant external pressure of 1 atm. Wirr at 300 K is: (a) -15.921 kJ (b) -11.224 kJ (c) -110.83 kJ (d) None of these Question 3. At absolute zero the entropy of a perf...

Test for carbonates - - add dilute HCL - it makes carbon dioxide test for carbon dioxide by bubbling it through lime water Test for ammonium ions - -add sodium hydroxide -warm the mixture -hover damp red litmus paper over it , if it turns blue the ions are present Test for sulphate ionz (SO4 2-) - - add dilute HCL - then add BaCl2 - BaSO4 is made which is insoluble in water so a white precipitate will be formed Test for Halides (Cl-, Br-, I-) - - add nitric acid - add silver nitrate -...

AQA GCSE Chemistry What is the charge of a proton? - ANS +1 What is the charge of a neutron? - ANS 0 What is the charge of an electron? - ANS -1 What is the relative mass of a proton? - ANS 1 What is the relative mass of a neutron? - ANS 1 What is the relative mass of an electron? - ANS Very small How many types of atoms do elements contain? - ANS Only one type What are compounds? - ANS Substances containing two or more different elements that...