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1. For the reaction between aqueous solutions of calcium chloride and sodium car

ID: 544007 • Letter: 1

Question

1. For the reaction between aqueous solutions of calcium chloride and sodium carbonate, write (a) the balanced molecular equation, (b) the complete ionic equation, (c) the net ionic equation. 2. (a) How many milliliters of 3.0 M HSO, are needed to make 450 mL of 0.10 M Hso. (b) What is the molar concentration of each ion present in a 0.025 M aqueous solution of calcium nitrate? The temperature ofa 12.58 g sample of calcium carbonate [CaCO3 (j) increases from 235°C to 382°C If the specific heat of calcium carbonate is 0.82 J/g-K, how many joules of heat are absorbed?

Explanation / Answer

Ans 1

Part a

Balanced Molecular equation:

Na2CO3(aq) + CaCl2(aq) = CaCO3(s) + 2NaCl(aq)

Part b

The complete ionic equation
Ca+2(aq) + 2Cl-(aq) + 2Na+(aq) + CO3-2(aq) -->
CaCO3(s) + 2Na+(aq) + 2Cl-(aq)
Part c
the net ionic equation

Ca+2(aq) + CO3-2(aq) --> CaCO3(s)

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