Chemical Formulae, Equations And Calculations
Bayani Gaba-gaba
Chemical equations are the language chemists use to describe what happens during a reaction, and the calculations that follow let you predict exactly how much product you will make from a given amount of reactant. These skills underpin every topic in the rest of the course, from acids and bases to organic chemistry.
This lesson covers word and symbol equations, relative formula mass, the mole concept, reacting mass calculations, percentage yield, empirical and molecular formulae, solution concentrations, and gas volume calculations. Mastering these will give you the quantitative toolkit that Edexcel tests heavily across both Paper 1 and Paper 2.
Manufura
- write word equations and balanced chemical equations (including state symbols): - for reactions studied in this specification - for unfamiliar reactions where suitable information is provided.
- calculate relative formula masses (including relative molecular masses) (Mr) from relative atomic masses (Ar)
- know that the mole (mol) is the unit for the amount of a substance
- understand how to carry out calculations involving amount of substance, relative atomic mass (Ar) and relative formula mass (Mr)
- calculate reacting masses using experimental data and chemical equations
- calculate percentage yield
- understand how the formulae of simple compounds can be obtained experimentally, including metal oxides, water and salts containing water of crystallisation
- know what is meant by the terms empirical formula and molecular formula
- calculate empirical and molecular formulae from experimental data
- understand how to carry out calculations involving amount of substance, volume and concentration (in mol/dm3) of solution
- understand how to carry out calculations involving gas volumes and the molar volume of a gas (24 dm3 and 24 000 cm3 at room temperature and pressure (rtp))
- practical: know how to determine the formula of a metal oxide by combustion (e.g. magnesium oxide) or by reduction (e.g. copper(II) oxide)
Taswirar tunani
An zana wannan batu don ka ga yadda ra'ayoyi ke hadewa.
Bude taswirar tunani a cikin manhaja
Katunan tunawa
Gwaji mai sauri kan abin da ake jarraba a wannan batu.
Yi atisayen wadannan katuna a cikin manhaja
Takardar Darasi
Cikakken Bayanin Darasi Yana Kan Manhajar Green Bridge
Sami manhajar Green Bridge CBT a wayarka ko kwamfutarka domin cikakken laburaren IGCSE: takardun jarrabawar baya, tsarin kimantawa, taswirar tunani, katunan karatu da darussan sauti.
Nazarin Darasi
Barka da kammala darasi akan Chemical Formulae, Equations And Calculations. Yanzu da kuka bincika mahimman raayoyi da raayoyi, lokaci yayi da zaku gwada ilimin ku. Wannan sashe yana ba da ayyuka iri-iri Tambayoyin da aka tsara don ƙarfafa fahimtar ku da kuma taimaka muku auna fahimtar ku game da kayan.
Za ka gamu da haɗe-haɗen nau'ikan tambayoyi, ciki har da tambayoyin zaɓi da yawa, tambayoyin gajeren amsa, da tambayoyin rubutu. Kowace tambaya an ƙirƙira ta da kyau don auna fannoni daban-daban na iliminka da ƙwarewar tunani mai zurfi.
Yi wannan ɓangaren na kimantawa a matsayin wata dama don ƙarfafa fahimtarka kan batun kuma don gano duk wani yanki da kake buƙatar ƙarin karatu. Kada ka yanke ƙauna da duk wani ƙalubale da ka fuskanta; maimakon haka, ka kallesu a matsayin damar haɓaka da ingantawa.
- What is the relative formula mass (Mr) of sulfuric acid, H2SO4? (Ar: H = 1, S = 32, O = 16) A) 96 B) 98 C) 100 D) 49 Answer: B
- How many moles are in 4.4 g of carbon dioxide, CO2? (Ar: C = 12, O = 16) A) 0.05 B) 0.20 C) 0.10 D) 1.0 Answer: C
- At room temperature and pressure, what volume does 0.50 mol of any gas occupy? A) 6 dm3 B) 12 dm3 C) 24 dm3 D) 48 dm3 Answer: B
- A reaction has a theoretical yield of 25.0 g but only 20.0 g of product is collected. What is the percentage yield? A) 125% B) 80% C) 75% D) 20% Answer: B
- Which of these is the empirical formula of a compound with the molecular formula C6H12O6? A) C6H12O6 B) C3H6O3 C) CH2O D) CHO Answer: C
Yi aikin wadannan tambayoyi a cikin manhaja
Yi aikin wadannan tambayoyi a cikin manhaja
Littattafan da ake ba da shawarar karantawa
Ƙarin koyo daga tushe na buɗe
-
Sashen littafi
Reaction Stoichiometry
Explain the concept of stoichiometry as it pertains to chemical reactions
"Chemistry: Reaction Stoichiometry" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/chemistry/pages/4-3-reaction-stoichiometry. Access for free at https://openstax.org/books/chemistry/pages/1-introduction
-
Sashen littafi
Determining Empirical and Molecular Formulas
Compute the percent composition of a compound
"Chemistry: Determining Empirical and Molecular Formulas" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/chemistry/pages/3-2-determining-empirical-and-molecular-formulas. Access for free at https://openstax.org/books/chemistry/pages/1-introduction
Wasu ƙungiyoyi ne suka wallafa su ƙarƙashin lasisin buɗe, kuma muna ambaton su yadda suka nema. Hanyoyin suna buɗe shafukansu.
Yi Aikin Tambayoyin Gwaji
Kana son yin aikin tambayoyin gwaji kan Chemical Formulae, Equations And Calculations? Sauke manhajar Green Bridge CBT don samun tambayoyin gwaji da cikakkun jarrabawa akan wannan batu.
Sauke Manhajar Daga Google Playstore
Duk abin da kake buƙata don yin fice a JAMB, WAEC & NECO.
