Check The IGCSE Chemistry Complete Notes 📚

<div data-offset-key="tsr5-0-0" class="public-DraftStyleDefault-block public-DraftStyleDefault-ltr"><span data-offset-key="tsr5-0-0" style="font-weight: bold;"><span data-text="true">Chemical Reactions</span></span></div>

<div data-offset-key="99d0d-0-0" class="public-DraftStyleDefault-block public-DraftStyleDefault-ltr"><span data-offset-key="99d0d-0-0" style="font-weight: bold;"><span data-text="true">Physical and Chemical Changes</span></span></div>

<div data-offset-key="7thb6-0-0" class="public-DraftStyleDefault-block public-DraftStyleDefault-ltr"><span data-offset-key="7thb6-0-0"><span data-text="true">Identify physical and chemical changes, and describe the differences between them</span></span></div>

<div data-offset-key="ci08i-0-0" class="public-DraftStyleDefault-block public-DraftStyleDefault-ltr"><span data-offset-key="ci08i-0-0" style="font-weight: bold;"><span data-text="true">Rate of Reaction</span></span></div>

<div data-offset-key="8e7eu-0-0" class="public-DraftStyleDefault-block public-DraftStyleDefault-ltr"><span data-offset-key="8e7eu-0-0"><span data-text="true">Describe the effect on the rate of reaction of:</span></span></div>

<div data-offset-key="9rptf-0-0" class="public-DraftStyleDefault-block public-DraftStyleDefault-ltr"><span data-offset-key="9rptf-0-0"><span data-text="true">(a) changing the concentration of solutions</span></span></div>

<div data-offset-key="ea1cr-0-0" class="public-DraftStyleDefault-block public-DraftStyleDefault-ltr"><span data-offset-key="ea1cr-0-0"><span data-text="true">(b) changing the pressure of gases</span></span></div>

<div data-offset-key="21iss-0-0" class="public-DraftStyleDefault-block public-DraftStyleDefault-ltr"><span data-offset-key="21iss-0-0"><span data-text="true">(c) changing the surface area of solids</span></span></div>

<div data-offset-key="2ltgd-0-0" class="public-DraftStyleDefault-block public-DraftStyleDefault-ltr"><span data-offset-key="2ltgd-0-0"><span data-text="true">(d) changing the temperature</span></span></div>

<div data-offset-key="cu6fn-0-0" class="public-DraftStyleDefault-block public-DraftStyleDefault-ltr"><span data-offset-key="cu6fn-0-0"><span data-text="true">(e) adding or removing a catalyst, including enzymes</span></span></div>

<div data-offset-key="1asgp-0-0" class="public-DraftStyleDefault-block public-DraftStyleDefault-ltr"><span data-offset-key="1asgp-0-0"><span data-text="true">State that a catalyst increases the rate of a reaction and is unchanged at the end of a reaction</span></span></div>

<div data-offset-key="d9m34-0-0" class="public-DraftStyleDefault-block public-DraftStyleDefault-ltr"><span data-offset-key="d9m34-0-0"><span data-text="true">Describe practical methods for investigating the rate of a reaction including change in mass of a reactant or a product and the formation of a gas</span></span></div>

<div data-offset-key="9i190-0-0" class="public-DraftStyleDefault-block public-DraftStyleDefault-ltr"><span data-offset-key="9i190-0-0"><span data-text="true">Interpret data, including graphs, from rate of reaction experiments</span></span></div>

<div data-offset-key="9gj05-0-0" class="public-DraftStyleDefault-block public-DraftStyleDefault-ltr"><span data-offset-key="9gj05-0-0"><span data-text="true">Describe collision theory in terms of:</span></span></div>

<div data-offset-key="biggp-0-0" class="public-DraftStyleDefault-block public-DraftStyleDefault-ltr"><span data-offset-key="biggp-0-0"><span data-text="true">(a) number of particles per unit volume</span></span></div>

<div data-offset-key="51vq8-0-0" class="public-DraftStyleDefault-block public-DraftStyleDefault-ltr"><span data-offset-key="51vq8-0-0"><span data-text="true">(b) frequency of collisions between particles</span></span></div>

<div data-offset-key="dpav2-0-0" class="public-DraftStyleDefault-block public-DraftStyleDefault-ltr"><span data-offset-key="dpav2-0-0"><span data-text="true">(c) kinetic energy of particles</span></span></div>

<div data-offset-key="a7cpm-0-0" class="public-DraftStyleDefault-block public-DraftStyleDefault-ltr"><span data-offset-key="a7cpm-0-0"><span data-text="true">(d) activation energy, Ea</span></span></div>

<div data-offset-key="2ajk-0-0" class="public-DraftStyleDefault-block public-DraftStyleDefault-ltr"><span data-offset-key="2ajk-0-0"><span data-text="true">Describe and explain the effect on the rate of reaction of:</span></span></div>

<div data-offset-key="29tl3-0-0" class="public-DraftStyleDefault-block public-DraftStyleDefault-ltr"><span data-offset-key="29tl3-0-0"><span data-text="true">(a) changing the concentration of solutions</span></span></div>

<div data-offset-key="aa63r-0-0" class="public-DraftStyleDefault-block public-DraftStyleDefault-ltr"><span data-offset-key="aa63r-0-0"><span data-text="true">(b) changing the pressure of gases</span></span></div>

<div data-offset-key="4ie1d-0-0" class="public-DraftStyleDefault-block public-DraftStyleDefault-ltr"><span data-offset-key="4ie1d-0-0"><span data-text="true">(c) changing the surface area of solids</span></span></div>

<div data-offset-key="9i0ua-0-0" class="public-DraftStyleDefault-block public-DraftStyleDefault-ltr"><span data-offset-key="9i0ua-0-0"><span data-text="true">(d) changing the temperature</span></span></div>

<div data-offset-key="4ssnp-0-0" class="public-DraftStyleDefault-block public-DraftStyleDefault-ltr"><span data-offset-key="4ssnp-0-0"><span data-text="true">(e) adding or removing a catalyst, including enzymes</span></span></div>

<div data-offset-key="c9764-0-0" class="public-DraftStyleDefault-block public-DraftStyleDefault-ltr"><span data-offset-key="c9764-0-0"><span data-text="true">using collision theory</span></span></div>

<div data-offset-key="5u0ot-0-0" class="public-DraftStyleDefault-block public-DraftStyleDefault-ltr"><span data-offset-key="5u0ot-0-0"><span data-text="true">State that a catalyst decreases the activation energy, Ea, of a reaction</span></span></div>

<div data-offset-key="3o7or-0-0" class="public-DraftStyleDefault-block public-DraftStyleDefault-ltr"><span data-offset-key="3o7or-0-0"><span data-text="true">Evaluate practical methods for investigating the rate of a reaction including change in mass of a reactant or a product and the formation of a gas</span></span></div>