** I need help with these questions! Thank you** I will rate you! 32. All fth fo

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32. All fth following would drive a double displacemet reaction fir a. formation of water b. formation of a precipitate generation of a gas solubility of reactants c. d. 33. A solution was found to have a pH of 4.0. This means its hydrogen ion concentration is a. 4.0M b. 0.602M c. 0.0001M d. 0.0004M -3 4. The number of moles of oxygen in the potassium chlorate decomposition experiment was determined from the equation PV nRT. If the pressure that day was 745 mmHg, the temperature 22tc, R-0.0821 L-atm/mol-K, and the volume of the gas is 225mL how many mole of the gas was collected? a. 745 745 760 0.225 0.0821 295 225 760 0.0821.295 b. 745 0.225 0.0821 295 d 745 225 0.0821 295 35. A double displacement reaction was carried out represented by combining the following Na2SO4 + BaCl2 ? The predicted precipitate is a. CISO4 b. NaCl c. Na2Cl d. BaSO

Explanation / Answer

32 ) d ) solubility of reactants

33) we know that

pH = -log [H+]

4 = - log [H+]

[H+] = 10^(-4)

[H+] = 0.0001 M

so the answer is c ) 0.0001 M

34 )

pressure = (745/760) atm

volume = 225 ml = 0.225 L

so the answer should be option a

35)

Na2SO4 + BaCl2 ---> BaSO4 (s) + 2 NaCl

so

the precipitate formed is BasO4

so

the answer is d) BaSO4

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