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22/08/19

Retweetd From Harris Federation Classics

So proud of all Classics and Latin students. Amazing performance for with all students getting Level 9s amd A*.

22/08/19

Retweetd From Harris Federation

Congratulations to all at on their superb today. A special mention goes to Viktoria, who achieved a Grade 9 in all 11 of her subjects - a remarkable achievement. https://t.co/8VFFPIKSPl

20/08/19

Retweetd From Harris Federation

Here are some of our brilliant students heading to and this year. Many are the first in their family to attend university and all have beaten extraordinary odds to get there. We are so proud of them and wish them every happiness and success. https://t.co/HJt7DF572H

19/08/19

Retweetd From Harris Federation

We're so proud of all our Sixth Formers on their . Great to see them taking their next steps - whether that's university, an apprenticeship or employment. We can't wait to see what they do next. Here's a round-up of all their successes: https://t.co/I713jYXeX7 https://t.co/ooYTrgebv6

15/08/19

A Level students achieve record success! 😁 https://t.co/22JWigRxfx https://t.co/Q9udvnlp7t

15/08/19

Retweetd From Harris Federation

Congratulations to student Daniel who has gained an amazing 7 A* grades and is off to to read Maths. He's going to be speaking about his fantastic achievement on the later this afternoon https://t.co/OmeZfhakxQ

15/08/19

And it begins 😬 🤞🏻 https://t.co/0KdYMygsVD

15/08/19

Results day 😬 We are open for results to be collected from 8:30am until 10:30 this morning. Best of luck to everyone 😁

17/07/19

Retweetd From Harris Federation Classics

Roman Londinium walk with ‘s youngest Classicists. https://t.co/UleiuSSVjc

17/07/19

Retweetd From HACHFutures

A fantastic event for HACH students interested in medicine last week with - some strong stomachs needed!! Well done to all involved. https://t.co/bqCxwlEumD

17/07/19

Retweetd From HarrisSchoolDirect

Some fabulous artwork on display this morning! https://t.co/FUL7CN3Gto

16/07/19

Wasn’t it just amazing 😁

16/07/19

Half way through our fantastic summer show. Time for a drink and some food 😁 🎉 https://t.co/ylcEsc5veb

14/07/19

Retweetd From HACH PGL

https://t.co/1QBLVgu2Ss

14/07/19

Retweetd From HACH PGL

YMCA! https://t.co/zmuRXZmELv

14/07/19

Retweetd From HACH PGL

End of stay disco https://t.co/Cr5PSMBZZQ

14/07/19

Retweetd From HACH PGL

Group 2 ready for activity 4! https://t.co/foBy9cQPJN

14/07/19

Retweetd From HACH PGL

Survival skills! https://t.co/DR4d8MiUhR

14/07/19

Retweetd From HACH PGL

Activity 4! https://t.co/K1E4rTSnPx

14/07/19

Retweetd From HACH PGL

This weekend is all about teamwork! https://t.co/zJ1x7uoOQm

Harris Academies
All Academies in our Federation aim to transform the lives of the students they serve by bringing about rapid improvement in examination results, personal development and aspiration.

Central Office

Bexley

Bromley

Croydon

Greenwich

Haringey

Havering

Merton

Newham

Southwark

Sutton

Thurrock

Wandsworth

Westminster

Chemistry

Summer Work A level Chemistry

1)  a)  What is the difference between an element and a compound?                                         (2)

         

     b)  All substances are made up of three types of particle: atoms, molecules or ions.  Explain what atoms, molecules and ions are.                                                                                                      (3)

         

     c)  Identify each of the following particles as an atom, molecule or ion.                                   

            

                   NH3        O2-      SO42-       F2        O        O2        NO3-       H2O       Cl        H+         (10)

 

2)      Write the formula of the following substances.  Some are ionic, some are atomic and some are molecular.

         

     a)  lithium oxide                                              e)  ammonia

         

     b)  calcium nitrate                                           f)  nitrogen

         

     c)  methane                                                    g)  argon

         

     d)  ammonium sulphate                                 h)  iron (III) hydroxide                                        (8)

 

3)      Balance the following equations.

         

     a)  Fe  +  H2O  ®  Fe3O4  +  H2                                                                                                (1)

         

     b)  PCl3  +  H2O  ®  P(OH)3  +  HCl                                                                                        (1)

         

     c)  ammonia  +  oxygen  ®  nitrogen  +  water                                                                       (2)

         

     d)  ethane  +  oxygen  ®  carbon dioxide  +  water                                                                 (2)

 

4)      Complete the following calculations, giving your answers to three significant figures.

 

     a)  32420 + 762891  b)  12000 ÷ 1000           c)  0.06438 + 0004378  d)  180 ÷ 90                 (4)

 

5)      The following results are accurately measured values from experiments.  Complete the sum and give the answer to the most number of significant figures that you think gives an answer that is trustworthy.

 

     a)  1.4567 + 2.3        b)  10.5 - 0.145              c)  3.000 - 0.056           

     d)  8693.457 + 1.2367                                                                                                                        (4)

 

 

 

6)      Rearrange the following equations to give the letter shown as the subject.

 

      a)   What does c equal if       q = mcT ?                          d)   What does n equal if       PV = nRT ?

     

      b)   What does T equal if       G = H - TS                         e)   What does c equal if        2a = 3(b – 2c)

 

      c)   What does q equal if       E = 3pq                              f)    What does T equal if       F = mc + Rk                           (6)

                                                                2r                                                                                                   T

 

Challenge for the week

 

 

7)      Balance the following equations.

 

     a)  KMnO4  +  HCl  ®  KCl  +  MnCl2  +  Cl2  +  H2O                                                               (2)

 

     b)  As4O6  +  S2Cl2  +  Cl2  ®  AsCl2  +  SO2                                                                           (2)

 

 

Total - 47                     

 

1)      Write the formula of the following substances. 

            

     a)  strontium hydroxide                                  f)  scandium (III) chloride

            

     b)  lithium iodide                                             g)  nitrogen

            

     c)  sulphur                                                      h)  ammonium carbonate

            

     d)  potassium oxide                                        i)   phosphorus

            

     e)  silicon                                                        j)   potassium                                                   (10)

 

2)      Balance the following equations.

            

     a)  methane  +  oxygen  ®  carbon monoxide  +  water                                                         (2)

            

     b)  sodium hydrogencarbonate  +  nitric acid  ®  sodium nitrate  +  carbon dioxide  +  water (2)

            

     c)  ammonia  +  sulphuric acid  ®  ammonium sulphate                                                        (2)

            

     d)  phosphorus  +  oxygen  ®  phosphorus (V) oxide                                                             (2)

 

3)      Convert the following to ionic equations:

            

     a)  silver (I) nitrate (aq)  +  potassium iodide (aq)  ®  silver (I) iodide (s)  +  potassium nitrate (aq)     (2)

            

     b)  sodium carbonate (aq)  +  hydrochloric acid (aq) 

                                                                            ®  sodium chloride (aq)  +  water (l)  +  carbon dioxide (g) (2)

            

     c)  potassium hydroxide (aq)  +  sulphuric acid (aq) ®  potassium sulphate (aq)  +   water (l) (2)

            

     d)  sodium hydrogencarbonate (aq)  +  hydrochloric acid (aq)

                                                                            ®  sodium chloride (aq)  +  water (l)  +  carbon dioxide (g) (2)

 

4)   a)   The mass of one mole of 23Na atoms is 22.9898 g.  Given that the Avogadro constant equals 6.0225 x 1023 and the mass of one electron equals 9.1091 x 10-28 g, calculate the mass of one mole of 23Na+ ions.                                                                                (2)

                                     

      b)   i)    Calculate the mass of one mole of 1H atoms given that the Avogadro constant equals 6.0225 x
      1023, the mass of one electron equals 9.1091 x 10-28 g and the mass of one proton equals 1.6725 x
      10-24 g.

 

             ii)   The relative atomic mass of hydrogen equals 1.0079.  Explain the difference between this value
      and your answer to (i).                                                                                                                                                   (3)

 

5)      Complete the following calculations, giving your answers to three significant figures.

 

     a)  87340 + 128713       b)  2400 ÷ 100          c)  0.0125 + 0.00762     d)  23.45 + 0.173         (4)

 

6)      The following results are accurately measured values from experiments.  Complete the sum and give the answer to the most number of significant figures that you think gives an answer that is trustworthy.

 

     a)  10.175 + 0.1             b)  278.0 – 0.16        c)  3270 – 71.4              d)  35.36781 + 0.123   (4)

 

7)      Rearrange the following equations to give the letter shown as the subject.

            

     a)  What does b equal if                                     T = 2ab/c                  c)  What does T equal if PV = nRT

            

     b)  What does c equal if                                      E = mc2                    d)  What does p equal if B = A(2r – p)  (4)

 

 

Challenge for the week

8)  a)  Calculate the expected mass of one mole of 31P atoms given that the Avogadro constant equals 6.0225 x 1023, the mass of one electron equals 9.1091 x 10-28 g, the mass of one proton equals 1.6725 x 10-24 g and the mass of one neutron equals 1.6748 x 10-24 g.                            (3)

     b)  The actual mass of one mole of 31P atoms is 30.9738 g.  Try to account for the difference between this value and your answer to (a).                                                                                      (2)

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