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Edexcel CHEMISTRY DOUBTS!!!!

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conquerpro:
can anyone solve this question?
a solid gives a red colour in a flame test and reacts with conc H2SO4 to produce steamy fumes,but no other gases.the solid could be
A.LiBr
B.SrCl2
C.CaCl2
D.NaCl
the answer is SrCl2.but as we know CaCl2 also gives a brick red colour with conc H2SO4.so why not CaCl2

DrThamooth:
heyy
i need help in past papers x_x
june 2010 - Q19 a ii
i cannot solve it :/
 Ethanoic acid can be manufactured by the following reaction, which is carried out
between 150 °C and 200 °C.
CH3OH(g) + CO(g) = CH3COOH(g)
 (a) A mixture of 50.0 mol of methanol and 50.0 mol of carbon monoxide reaches
equilibrium at a pressure of 32.0 atm. At 175 °C, the equilibrium partial pressure of
ethanoic acid is 22.2 atm.

 (ii) Calculate the partial pressures of methanol and carbon monoxide at equilibrium.

conquerpro:



can someone plzz solve this MCQ for me and explain?
a sample of swimming pool water contains 0.482 ppm of chlorine.this is equal to a percentage of
  A.0.000482
B.0.0000482
C.0.00000482
D.0.000000482
this is from edexcel chem 1
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conquerpro:
can someone PLZZZZ tell me what  happens when zinc hydroxide reacts with H+ ions?cuz i know ZN(OH)2 is amphoteric and reacts with OH- ions to give ZN(OH)4 but what does it give when it reacts with H+ ions?

astarmathsandphysics:
water I think

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