You’re going to need to get your pens ready for this one! Calculations in chemistry And quickly finishing off metallic structures.

Slides:

Advertisements

Similar presentations

What is an oxide? An oxide is a Binary compound of oxygen and another element. M & O Oxides can be classified in two ways – Nature of Oxides Amount of.

Advertisements

IC5.5.5 Formulae of salts © Oxford University Press 2011 Formulae of salts How to work out the formulae of salts.

Calculations What you need to know: Relative formula mass Empirical formula % composition by mass Use balanced equations to calculate masses of reactants.

Calculating Reacting Masses

Molar Mass and Mole Calculation Problems

Percentage yield Perform calculations to determine the percentage yield of a reaction Atom Economy Perform calculations to determine the Atom Economy of.

SPLAT! GCSE Chemistry – Making Salts.

Name that salt!. How many acids can you name? Match the name to the formula Hydrochloric acid Sulphuric acid Nitric acid Ethanoic acid HC l H 2 SO 4.

Relative atomic mass - A r Just another way of saying how heavy different atoms are compared with the mass of one atom of carbon – 12 (regular carbon!)

Combining Elements D. Crowley, Combining Elements To know what happens when elements combine, and to be able to name compounds To know what happens.

Quiz: March 8 Balance the following equations: K2O + H2O -> KOH

Chemical Formula D. Crowley, 2007.

Noadswood Science, Mass, Moles & Formula  To know how to calculate formula mass and work out the percentage of an element within a compound Saturday,

MOLAR MASS. What is Molar Mass  The SUM of the atomic masses of the atomic species as given in the molecular formula.  2 x g= g/ mole Cl.

Chemical Formulas. Molecules and Compounds 4 A molecule is two or more atoms that are bonded together. –H 2, O 2, N 2, H 2 O, CO 2 4 A compound is two.

11/10/2015 Reactions of metals and metal compounds.

H 2 SO 4 + Zn  1) Sulphuric acid + zinc 3) Nitric acid + sodium thiosulphate 2) Hydrochloric acid + magnesium 4) Hydrogen peroxide with catalyst Popular.

Chemical Equations Learning Objective:

Lonely man + lonely woman = happy couple + Metal + oxygen → Metal Oxide Example: Cu + O 2 → CuO or balanced…… 2Cu + O 2 → 2CuO Cu + Cu + O 2 → CuO + CuO.

27/05/2016 Relative mass formula, atomic mass, and empirical formula.

What is a Chemical Reaction? Is burning a twig a chemical or physical change? What about dissolving salt into water? How do I know?

An Atom is ……………. An Element is …………... A Compound is ………….

Acid and Bases Oxides Many acids and bases are formed by dissolving oxides in water.

IGCSE CHEMISTRY LESSON 2. Section 1 Principles of Chemistry a)States of matter b)Atoms c)Atomic structure d)Relative formula mass e)Chemical formulae.

Reactions of Alkalis 3. understand that alkalis neutralise acids to make salts 4. recall that soluble hydroxides and carbonates are alkalis (Higher) 5.

Empirical Formulae The empirical formula of a compound is the simplest ratio of the different atoms in it. For example, for ethane (C2H6)it is CH3. You.

Chemical Reactions. What is a Chemical Reaction? A chemical reaction is the process by which a chemical change occurs. A chemical change is a change in.

IC5.1.4 Calculations © Oxford University Press Calculations.

Atomic Structure Structure of the atom Elements Mixtures Compounds.

Do Now 1.Write the word equation for the reaction of calcium and water Calcium + water  calcium hydroxide + hydrogen 2.Write the word equation for the.

Starter Potassium and oxygen Sodium and chlorine Magnesium and oxygen

Exercise 1 – identifying reactants and products

07/12/2017 Using Chemistry.

CHEMICAL FORMULAE & REACTION QUANTITIES

Rules recap! A small number just talks about the element it is behind. E.g. O2 = 2 x O Small numbers outside the bracket mean multiply everything inside.

Exercise 1 – identifying reactants and products

Moles Noadswood Science, 2016.

Coke in the blast furnace

Chemical Equations – Outcomes

Balanced Equations 2H2 + O2  2H2O

This is Neon. He is a stable atom. This makes him happy!

Atomic structure of the first elements

Reactions of metals and metal compounds

Reactions of Acids.

Particles and Moles Substances can be measured in several ways. They can be: Number of grams Number of particles Number of moles One mole of atoms is.

Relative Formula Mass Noadswood Science, 2016.

Q 2 Create a list of ways you can quickly predict whether two elements will create an ionic bond. What are chemical formulas and why are they useful? Write.

CC9 - Calculating Involving Masses (p26-30)

Starter Activity Balance the below equations: Mg + O2  MgO

Reactions of metals and metal compounds

13/11/2018 Chemistry in Action Mr Ronesh British School in Baku.

Wednesday, November 14, 2018Wednesday, November 14, 2018

Reactions of metals and metal compounds

Basic Chemistry.

Knowledge Organiser – Formulae and equations

Making salts All Must: Be able to describe how to neutralise an acid

Relative Formula Mass This is the total mass of the sum of all the relative atomic masses of the elements in a compound.

Reactions of Acids.

Conservation of Mass Noadswood Science, 2016.

Stoichiometric Calculations

W Richards The Weald School

Relative mass formula, atomic mass, and empirical formula

Chemicals of the Natural Environment.

W Richards Worthing High School

The atomic number tells us:

Presentation transcript:

You’re going to need to get your pens ready for this one! Calculations in chemistry And quickly finishing off metallic structures

Relative atomic mass - A r Just another way of saying how heavy different atoms are compared with the mass of one atom of carbon – 12 (regular carbon!) Mass number Q. What does the atomic mass number represent? A. Total number of protons and neutrons found in an atoms nucleus Atomic number Number of protons present

Relative atomic mass - A r ElementArAr H1 C12 O16 Mg24 Cl35. Table.1. Different elements and their different A r Relative atomic mass is easy!! It’s the same value as the mass number – it just sounds scarier! So what does this tell us about Mg and H?

Relative formula mass - M r To find the relative formula mass (M r ) of a compound, you just add together the A r values for all the atoms in its formula. Example 1: Find the M r of carbon monoxide (CO). The A r of carbon is 12 and the A r of oxygen is 16. So the M r of carbon monoxide is = 28. Example 1: Find the M r of carbon monoxide (CO). The A r of carbon is 12 and the A r of oxygen is 16. So the M r of carbon monoxide is = 28. O 16 8

Relative formula mass - M r Example 2:Find the M r of sodium oxide-Na 2 O The A r of sodium is 23 and the A r of oxygen is 16. So the M r of sodium oxide is (23 x 2) + 16 = 62.

Carbon dioxide Sulphur dioxide SO 2 Calcium carbonate CaCO 3 Sodium hydroxide NaOH Sulphuric acid H 2 SO 4 Hydrochloric acid HCl Copper sulphate CuSO 4 Magnesium chloride MgCl 2 Sodium carbonate Na 2 CO 3 Find the M r of these: