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Question
quiz : balancing chemical reactions
balance the following reaction (enter the coefficients)
cl₂ + nabr → nacl + br₂
Step1: Balance the chlorine atoms
On the left - hand side, we have \(Cl_2\) (2 chlorine atoms). On the right - hand side, we have \(NaCl\). Let the coefficient of \(Cl_2\) be \(a\), the coefficient of \(NaBr\) be \(b\), the coefficient of \(NaCl\) be \(c\), and the coefficient of \(Br_2\) be \(d\). For chlorine: \(2a=c\).
Step2: Balance the bromine atoms
On the left - hand side, we have \(b\) bromine atoms (from \(NaBr\)), and on the right - hand side, we have \(2d\) bromine atoms (from \(Br_2\)). So \(b = 2d\).
Step3: Balance the sodium atoms
On the left - hand side, we have \(b\) sodium atoms (from \(NaBr\)), and on the right - hand side, we have \(c\) sodium atoms (from \(NaCl\)). So \(b=c\).
Let \(a = 1\). Then \(c=2\) (from chlorine balance). Since \(b = c\), \(b = 2\). And since \(b = 2d\), \(d = 1\).
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\(1\) \(Cl_2+2\) \(NaBr
ightarrow2\) \(NaCl + 1\) \(Br_2\)