IB DP Chemistry: SL復習筆記11.2.6 Analysing Graphs
Analysing Graphs The?gradient?of a graph can be found by: In the case of a straight line graph: using a triangle and the equation for a straight line In the case of a curve: drawing a?tangent?to th...
IB DP Chemistry: SL復習筆記11.2.5 Drawing Graphs
Drawing Graphs General guidance on drawing graphs Graphs need to have: Clear title Labelled axes Units on the axes Appropriate linear scales without any jumps This means the plotted graph must occu...
IB DP Chemistry: SL復習筆記11.2.4 Percentage Error
Percentage Error Percentage error?is used to express the difference between a final calculated answer and an accepted or literature value It is calculated using the following formula You should be ...
IB DP Chemistry: SL復習筆記11.2.3 Reducing the Impact of Errors
Reducing Errors Random errors?can be reduced by repeated trials and measurements Multiple measurements when averaged will reduce the impact of a?random error?on the average The more readings you ha...
IB DP Chemistry: SL復習筆記11.2.2 Processing Errors
Types of Errors An error is the difference between a value or quantity obtained in an experiment and an accepted or literature value for an experiment There are two types of errors in experiments,?...
哈佛錄取率逐年降低，2022年最新錄取哈佛優秀文書展示
近日，很多大學都陸續公布了2022年的新生錄取數據，哈佛大學也不例外。與往年數據一對比，簡直不敢相信自己的眼睛。一起來看看吧~ 申請人數再度攀升，錄取率逐年降低 哈佛大學2026屆申請數據 申請批次 申請數量 ...
IB DP Chemistry: SL復習筆記11.2.1 Recording Data
Qualitative & Quantitative data When recording results of experiment, both?quantitative?and?qualitative?data should be obtained Quantitative data?is obtained from measurements whereas?qualitati...
IB DP Chemistry: SL復習筆記11.1.4 Infrared Spectroscopy
How IR Spectroscopy works All?covalent bonds?act rather like springs, as opposed to rigid bars Like springs, the bonds can vibrate in a number of different ways The frequency of vibration occurs in...
IB DP Chemistry: SL復習筆記11.1.3 Nuclear Magnetic Resonance Spectroscopy
How NMR works Nuclear Magnetic Resonance (NMR)?spectroscopy is used for analysing organic compounds Only atoms with?odd?mass numbers?show signals on?NMR?spectra and have the property of?nuclear?spi...
IB DP Chemistry: SL復習筆記11.1.2 Mass Spectrometry
Determining Molecular Mass When a compound is analysed in a mass spectrometer, vaporised molecules are bombarded with a beam of high-speed electrons These knock off an electron from some of the mol...
IB DP Chemistry: SL復習筆記11.1.1 Index of Hydrogen Deficiency
Index of Hydrogen Deficiency The?degree of unsaturation?or?index of hydrogen deficiency?provides information about the number of double or triple bonds in a molecule The?IHD?is the number of...
IB DP Chemistry: SL復習筆記10.2.13 Reactions of Benzene
Reactions of Benzene Arenes?are very stable compounds due to the?delocalisation of π electrons?in the ring This is because the electron density is spread out over the molecule instead of being conf...
