The following reaction is known to occur between carbon dioxide and water: co, (

Question

The following reaction is known to occur between carbon dioxide and water: co, (g) If the system used in this experiment is allowed to sit for too long before taking a reading,. 2. + H,O(1) HCO3 (aq) (carbonic aca) this reaction will occur Will this raise, lower, or have no effect on the water level in the buret? Explain. a. Does the pressure in the closed end of the system increase, decrease, or stay the same as the CO2 dissolves into the water? Explain. b. How will this affect the experimental mass percent of sodium bicarbonate! Explain. c. POST

Explanation / Answer

a)

Not likely to have any effect

since density of H2CO3 diluted, will not affect

b)

As CO2 dissolves, Pressure must decrease, since CO2(g) is forming CO2(aq)

c)

the % mass of Na2CO3

will be affected, since there will be extra CO2 which acts as an acid

so reacts with Na2CO3

we will use less titrant, therefore concentration will appear to be lower

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