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OCR Salters B AS Chemistry - Elements of Life Questions and Answers 2024
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OCR Salters B AS Chemistry - Elementsof Life
How do you convert from cubic decimetres to cubic centimetres? - answerMultiply by
1000
What is the flame colour for lithium ions? - answerBright red
What is the flame colour for sodium ions? - answerYellow
What is the flame colour for potassium ions? - answerLilac
What is the flame colour for calcium ions? - answerBrick red
What is the flame colour for barium ions? - answerApple green
What is the flame colour for copper ions? - answerBlue-green
How do you convert from cubic centimetres to cubic decimetres? - answerDivide by
1000
What is the formula for concentration? - answerMoles/Volume
What is the equation for the speed of light? - answerFrequency x wavelength
What is the formula for the number of moles? - answerMass/Molar Mass
What is the formula for percentage yield? - answerExperimental yield/Theoretical yield x
100
What is the name of a molecule with 6 areas of electron density? - answerOctahedral
What is the name of a molecule with 5 areas of electron density? - answerBipyramidal
What is the name of a molecule with 4 areas of electron density? - answerTetrahedral
What is the name of a molecule with 3 areas of electron density? - answerTrigonal
planar
What is the name of a molecule with 2 areas of electron density? - answerLinear
, What is the bond angle of an octahedral molecule? - answer90 degrees
What is the bond angle of a bipyramidal molecule? - answer120 and 90 degrees
What is the bond angle of a tetrahedral molecule? - answer109.5 degrees
What is the bond angle of a trigonal planar molecule? - answer120 degrees
What is the bond angle of a linear molecule? - answer180 degrees
By how many degrees does a lone pair repel other bonds? - answer2.5 degrees
Define the term 'dative covalent bond' - answerA covalent bond where both electrons
have been donated by one atom.
Define the term 'isotope' - answerIsotopes have the same atomic number but different
mass numbers.
What is the maximum number of electrons in the s-sub shell? - answer2
What is the maximum number of electrons in the p-sub shell? - answer6
What is the maximum number of electrons in the d-sub shell? - answer10
What is the maximum number of electrons in the f-sub shell? - answer14
Using Avogadro's constant, what is the formula for number of moles? - answerNumber
of particles/Avogadro's constant
What is the relative mass of a proton? - answer1
What is the relative mass of a neutron? - answer1
What is the relative mass of an electron? - answer1/1836
What is the relative charge of a proton? - answer+1
What is the relative charge of a neutron? - answer0
What is the relative charge of an electron? - answer-1
Why does sodium hydroxide never go in the burette during titrations? - answerIt blocks
the burette
Name 2 indicators that can be used for acid-base titrations - answerMethyl orange and
phenolphthalein
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