What ion is Calcium most likely to form? and how do you know?

Chemistry

1 answer:

vlada-n [284]3 years ago

7 0

Answer: Ca2+

Explanation: calcium is most like to form Ca2+ because it has 2 electrons in it outermost shell. So it can only contribute 2 electrons for bonding.

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A scientist measures the standard enthalpy change for the following reaction to be -17.2 kJ : Ca(OH)2(aq) 2 HCl(aq)CaCl2(s)

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Answer: $\Delta H^{0}=-173.72$ kJ/mol

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The standard enthalpy of formation of HCl is calculated as:

$\Delta ^{0}=\Sigma H_{products}-\Sigma H_{reactants}$