C3.2.1 Hard and Soft Water

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Y P F G J C M J K H W A A E K Y B M Q U W
E G Y I O N E X C H A N G E C O L U M N Y
T I Q B J K N X K I W Y T N G L W N J N X
K D S W Y J L E O T P B B B P G H L C M K
D I R H F B W U B G E P A U C V P S C V X
Y S G B D A R K A D C T A C A F H O I D Y
E T T E M P O R A R Y H A R D W A T E R K
O I Q V P D V N F A P P P C N U Y K W J U
L L E C U D T D T F E B K M U G H A V N K
U L Q G R K J J E F L S O F T W A T E R N
T A B G E D J J A R V W N N X R U X Y H L
I T T T C S J S E U Y N T J Q K G T L S D
G I L N I U N T J C X S F Y P P S Y P T B
F O F N Q T A J F Q M W N K L M V U G Y Q
B N C K C W A G T V Y V O G K J P D V Q Q
E O G G D D M M G E K A E B X H R S C K K
G B B R I Y N L M F T V F A J T P G W O L
U W A C O A M A Q X W N H K Q N R F M X G
T H E R M A L D E C O M P O S I T I O N L
P V O Y M E B Q I E D W J N G K J J V A S
J T D Q Y N R Q F U S W S U C G V H P P C

Clues

  • A piece of equipment that softens water (3, 8, 6)
  • Contains Calcium and magnesium ions (4, 5)
  • Contains Hydrogencarbonate ions (9, 4, 5)
  • Forms a lather (4, 5)
  • Our water is.... (4)
  • Our water isn't... (4)
  • Seawater is boiled and the vapours cooled to form pure water (12)
  • This reaction (2HCO3 - CO3 + H2O) happens when temporary hard water is boiled. What's the scientific name? (7, 13)

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