Chemistry help please?

2NaNO3 + CaCl2 -> 2NaCl + Ca(NO3)2 Is balanced. How many of each ion are on either side of the equation?

# of Na ions?

# of NO3 ions?

# of Ca ions?

# of Cl ions?

2 Answers

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  • 4 years ago
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    Quick Answer: A balanced equation has same number of ions on both sides, hence number of ions on RHS = number of ions on LHS. I have given the number of ions on EACH side of the equation, below:

    2 Na ions

    2 NO3 ions

    1 Ca ion

    2 Cl ion

    Details:

    # of Na ions?

    * LHS (left hand side): 2NaNO3, where 2 is called the coefficient. This means that there are TWO NaNO3 molecules. Each NaNO3 molecule is made of ONE Na+ ion and ONE NO3- ion, that is what NaNO3 means.

    So how many Na+ ions are there in 1NaNO3? Well, only ONE Na+ ion, which means 2NaNO3 should have...

    2Na+ ions! Right? It s really that easy.

    On the RHS: 2NaCl, so each NaCl compound is made of an Na+ ion and a Cl- ion. So 2NaCl obviously has 2Na+ ions. So, we have TWO Na ions on the RHS and 2Na ions on the LHS, hence why the Na ions are balanced.

    # of NO3 ions?

    * Same thing again...LHS has TWO NO3- ions.

    And RHS has Ca(NO3)2. This means ONE Ca+ ion is attached to TWO NO3- ions. The 2 is not a coefficient here, it is a SUBSCRIPT (a little two next to the NO3- ion, which ONLY applies to the NO3 ion).

    RHS has TWO NO3- ions.

    # of Ca ions?

    LHS: ONE Ca+ ion and two Cl ions.

    RHS: ONE Ca+ ion (ofcourse because the equation is balanced, so you must have same number of ions on each side!) :P

    # of Cl ions?

    RHS = LHS = TWO Cl- ions.

    .

  • 4 years ago

    On the left side there are

    Na= 2

    NO3=2

    Ca=1

    Cl=2

    On the right there are

    Na= 2

    Cl=2

    Ca=1

    NO3=2

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