tag:blogger.com,1999:blog-5690887427829940237.post5857055078789645657..comments2024-01-16T00:26:39.356-08:00Comments on IGCSE Chemistry: 1.21 write word equations and balanced chemical equations to represent the reactions studied in this specificationHannahHelphttp://www.blogger.com/profile/03691395988069139300noreply@blogger.comBlogger8125tag:blogger.com,1999:blog-5690887427829940237.post-15603800633789468132017-01-01T00:40:33.858-08:002017-01-01T00:40:33.858-08:00Hey hannah, I just wanna say thanks so much for th...Hey hannah, I just wanna say thanks so much for those amazing blogs! They really help tons!! Anonymoushttps://www.blogger.com/profile/03215362599990916516noreply@blogger.comtag:blogger.com,1999:blog-5690887427829940237.post-34656216505847395522016-08-04T01:29:47.613-07:002016-08-04T01:29:47.613-07:00Equations are used to describe reactions.
Word Eq...Equations are used to describe reactions. <br />Word Equations<br />Word equations just have the name of the reactants involved. An example is shown below:<br />Hydrogen + Oxygen → Water<br />Balancing Chemical equations<br />Balancing chemical equations is necessary to make sure that you are following the law of conservation of mass. <br />The law of conservation of mass ensures that you are not magically creating or destroying atoms. <br />Here is a step by step example below:<br />Al O2 → Al2 O3<br />Notice how there are different number of Aluminium and Oxygen atoms on both sides.<br />Balancing it will ensure that there are the same amount of atoms on both sides. <br />If there is a number before the Element then it is a molecule. <br />The number is subscript are atoms. <br />To convert to only atoms, you have to multiply the molecules by the atoms<br />Stage 1: Balance the Aluminiums<br />On the left hand side we can see that there is one aluminium atom while on the right side there is 2.<br />To balance this we simply put a 2 in front of the aluminium on the left hand side. Below is how it should look like.<br />2 Al O2 → Al2 O3<br />Stage 2: Balance the oxygens<br />On the left hand side we have 2 oxygen atoms and on the right we have 3.<br />If we were to go from 2 to 3 we would have to use decimals. <br />For 2 to go into 3 we multiply by 1.5. <br />2 Al 1.5 O2 → Al2 O3<br />Ideally we don't want to leave this in decimals so we can do what we do in algebra and multiply everything out by 2. <br />So: <br /> 2 Al 1.5 O2 → Al2 O3 becomes 4 Al 3 O2 → 2 Al2O3<br />As we see above there are 4 aluminium atoms on both sides and 6 oxygen atoms on both side. ????????https://www.blogger.com/profile/01669150632630414333noreply@blogger.comtag:blogger.com,1999:blog-5690887427829940237.post-74205838267902382862015-12-31T07:57:24.692-08:002015-12-31T07:57:24.692-08:00What are the equations we need to know?What are the equations we need to know?Anonymoushttps://www.blogger.com/profile/10904070361206440708noreply@blogger.comtag:blogger.com,1999:blog-5690887427829940237.post-3695350489371994112015-03-17T04:04:05.920-07:002015-03-17T04:04:05.920-07:00I really appreciate all your hard work and effort,...I really appreciate all your hard work and effort,i got my igcse exams in may and this blog got me pumped haha :LAnonymoushttps://www.blogger.com/profile/01443247690321756047noreply@blogger.comtag:blogger.com,1999:blog-5690887427829940237.post-76380716646417889862014-08-24T01:23:38.350-07:002014-08-24T01:23:38.350-07:00"2H + O > H2O"
The actual balanced ch..."2H + O > H2O"<br />The actual balanced chemical for water is 2H2 + O2 > 2H2O<br />This is because both hydrogen and oxygen are diatomic molecules.<br />The same could be said of Carbon Dioxide: C + O2 > CO2Anonymoushttps://www.blogger.com/profile/14779589184394253720noreply@blogger.comtag:blogger.com,1999:blog-5690887427829940237.post-52198719968073467222014-02-01T06:56:12.891-08:002014-02-01T06:56:12.891-08:00This comment has been removed by the author.Anonymoushttps://www.blogger.com/profile/14459965949573697796noreply@blogger.comtag:blogger.com,1999:blog-5690887427829940237.post-26612547564317758982013-05-11T04:16:20.882-07:002013-05-11T04:16:20.882-07:00Thankyou! :)Thankyou! :)HannahHelphttps://www.blogger.com/profile/03691395988069139300noreply@blogger.comtag:blogger.com,1999:blog-5690887427829940237.post-16124119126992149852013-05-09T03:55:09.557-07:002013-05-09T03:55:09.557-07:00Balancing Chemical Equation was Nicely Explain.......Balancing Chemical Equation was Nicely Explain.......But Proper Definition is also required on chemical Equation which is given at http://www.ncerthelp.com/text.php?contype=Concept&class_id=10&sub_id=S&chapter_id=CH1&q_no=1Ncertsolutionshttps://www.blogger.com/profile/00459238006909325155noreply@blogger.com