4 Sains (Chemistry) by SITI NOOR SHAHEERA ILANI BT SHAH AZAM Moe https://padlet.com/g28372011/chem4science21 Space for group activities. en-us 2021-07-07 11:47:53 UTC 2024-11-15 11:42:36 UTC hello@padlet.com https://padlet.net/icons/png/2697.png g28372011 https://padlet.com/g28372011/chem4science21/wish/1640250446 MEMBERS:
NUKMAN
AMIEL AFIF TAN
CHAI ZHEN ANN
CHUNG YUN CHENG

TASK: 
PREPARE CALCIUM SULPHATE

Type of salt:
Insoluble

Method used to prepare:
Precipitation reaction


Explanation:
The ions in both aqueous
solutions exchange with
each other to form a new aqueous solution and a precipitate 

Chemical equation:
Ca(NO3)2+K2SO4 —> CaSO4 + KNO3


]]> 2021-07-07 11:50:15 UTC https://padlet.com/g28372011/chem4science21/wish/1640250446 g28372011 https://padlet.com/g28372011/chem4science21/wish/1640251243 MEMBERS:
FIRDAUS
GAN WEI GUANG
LEE BIN WEI
LEE XUN ZHE

TASK: 
PREPARE BARIUM SULPHATE

Type of salt:
Insoluble

Method used to prepare:
Double Decomposition Reaction

Explanation:
The ions in both aqueous solutions exchange with each other to form a new aqueous solution a

Chemical equation:
BaCl2 + Na2SO4 -> BaSO4 + 2NaCl
]]> 2021-07-07 11:51:20 UTC https://padlet.com/g28372011/chem4science21/wish/1640251243 g28372011 https://padlet.com/g28372011/chem4science21/wish/1640251523 MEMBERS:
LEOW JIAN YONG
LIM WAI KIT
LIM ZHI HIN
LIM ZHI YONG

TASK: 
PREPARE CALCIUM NITRATE

Type of salt:
Soluble

Method used to prepare:
Acid + Calcium Carbonate

Explanation:
React calcium carbonate with dilute nitric acid

Chemical equation:
CaCO3 + 2HNO3 -> Ca(NO3)2 + CO2 + H2O
]]> 2021-07-07 11:51:42 UTC https://padlet.com/g28372011/chem4science21/wish/1640251523 g28372011 https://padlet.com/g28372011/chem4science21/wish/1640252141 MEMBERS:
PUNG HONG SHENG
SHAHRUL HAZIM
CARMEN LAU
KATHLYN TRESA

TASK: 
PREPARE LEAD (II) SULPHATE

Type of salt:
Insoluble

Method used to prepare:
double decomposition reaction

Explanation:
lead nitrate solution, add drop of sodium sulfate solution.

Chemical equation:
Pb(NO3)2 + K2SO4 --> PbSO4 + 2KNO3
]]> 2021-07-07 11:52:29 UTC https://padlet.com/g28372011/chem4science21/wish/1640252141 g28372011 https://padlet.com/g28372011/chem4science21/wish/1640252540 MEMBERS:
LEIW JIA QI
LOI XUE ERN
NADIRAH
NUR IRDINA

TASK: 
PREPARE COPPER (II) CHLORIDE

Type of salt: Soluble

Method used to prepare:
Acid + Metal oxide

Explanation:


Chemical equation:
HCl + CuO --> CuCl2 + H2O
]]> 2021-07-07 11:52:56 UTC https://padlet.com/g28372011/chem4science21/wish/1640252540 g28372011 https://padlet.com/g28372011/chem4science21/wish/1640252831 MEMBERS:
NURUL ILISHAH
PUTERI ADILA
SHARARA KABIR
SITI NOR AZIZA
YAP ZHI TING

TASK: 
PREPARE MAGNESIUM (II) NITRATE

Type of salt:
soluble

Method used to prepare:
reaction between acid + reactive metal


Explanation:
Nitric acid and magnesium used to prepare Magnesium nitrate

Chemical equation:
2HNO3 + Mg --> Mg(NO3)2 + H2

Mg(NO3)2 --> MgO+NO2+O2 
]]> 2021-07-07 11:53:18 UTC https://padlet.com/g28372011/chem4science21/wish/1640252831 g28372011 https://padlet.com/g28372011/chem4science21/wish/1640253627 HEY EVERYONE. YOU'VE BEEN  DIVIDED INTO 7 GROUPS. PLEASE FIND YOUR NAME IN THE GROUP COLUMNS.

READ THE TASK.
ANSWERS THE QUESTIONS.

YOUR ANSWER SHOULD BE WRITTEN IN POST.
[CLICK 3 DOTS AT THE UPPER RIGHT CORNER, AND CLICK EDIT POST (PENCIL SYMBOL)]

YOU CAN DISCUSS AMONG YOUR GROUP MEMBERS IN COMMENT SECTION.

GOOD LUCK! PLEASE COMMENT HERE ONCE YOU'RE DONE.]]> 2021-07-07 11:54:20 UTC https://padlet.com/g28372011/chem4science21/wish/1640253627 g28372011 https://padlet.com/g28372011/chem4science21/wish/1641304367 MEMBERS:
MACSEN CHIA
ALIF ADHIM
NABIL
OMAR AFFANDI

TASK: 
PREPARE POTASSIUM CHLORIDE

Type of salt: Soluble/Insoluble

Method used to prepare:
Neutralisation reaction between acid and alkali

Explanation:
The hydrocholoric acid is mixed with potassium hydroxide to form potassium chloride and water

Chemical equation:
HCl + KOH -> KCl + H2O
]]> 2021-07-08 03:30:06 UTC https://padlet.com/g28372011/chem4science21/wish/1641304367 . m6100529 https://padlet.com/g28372011/chem4science21/wish/1641357079 2021-07-08 04:09:17 UTC https://padlet.com/g28372011/chem4science21/wish/1641357079 . m6100529 https://padlet.com/g28372011/chem4science21/wish/1641361294 2021-07-08 04:12:32 UTC https://padlet.com/g28372011/chem4science21/wish/1641361294