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Ira Lisetskai [31]
3 years ago
6

he balanced net ionic equation for precipitation of CaCO 3 when aqueous solutions of Na 2CO 3 and CaCl 2 are mixed is ________.

2Na (aq) CO32- (aq) Na2CO3 (aq) 2Na (aq) 2Cl- (aq) 2NaCl (aq) Na (aq) Cl- (aq) NaCl (aq) Ca (aq) CO32- (aq) CaCO3 (s) Na2CO3 (aq) CaCl2 (aq) 2NaCl (aq) CaCO3 (s)
Chemistry
1 answer:
ale4655 [162]3 years ago
6 0

Answer:

Net ionic equation: Ca^{2+}(aq.)+CO_{3}^{2-}(aq.)\rightarrow CaCO_{3}(s)

Explanation:

Reaction between Na_{2}CO_{3} and CaCl_{2} is an example of double decomposition reaction where each cations and anions of each salt exchange their partners during reaction to form CaCO_{3} and NaCl

CaCO_{3} is an insoluble salt. Hence precipitation of CaCO_{3} has been observed.

Molecular equation: Na_{2}CO_{3}(aq.)+CaCl_{2}(aq.)\rightarrow 2NaCl(aq.)+CaCO_{3}(s)

Total ionic equation:

2Na^{+}(aq.)+CO_{3}^{2-}(aq.)+Ca^{2+}(aq.)+2Cl^{-}(aq.)\rightarrow CaCO_{3}(s)+2Na^{+}(aq.)+2Cl^{-}(aq.)

Here Na^{+} and Na^{+} are spectator ions. Therefore they are eliminated from both side of total ionic equation to get net ionic equation.

Net ionic equation: Ca^{2+}(aq.)+CO_{3}^{2-}(aq.)\rightarrow CaCO_{3}(s)

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Answer:

0.574moles

Explanation:

Using the general gas equation;

PV = nRT

Where;

P = pressure (atm)

V = volume (Litres)

n = number of moles (mol)

R = gas law constant (0.0821 Latm/molK)

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According to the information provided in the question;

- Volume (V) = 12400mL = 12400/1000 = 12.4L

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Hence, using PV = nRT

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n = 1.17 × 12.4 ÷ 0.0821 × 308

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