Food Allergy to Tartrazine. Tartrazine is the food additive known as FD&C Yellow No. 5. Despite safety testing for this additive, some people have experienced a food allergy to tartrazine. Itching and hives are the symptoms most commonly seen in people who are senstive to this additive.
What is the first step in balancing a chemical equation? Rules of balancing chemical equations: 1. write the unbalanced equation 2. count the number of atoms of the same element on reactant and product side of equation 3. make the â¦ number of atoms the same by changing the coefficients, not subscripts 4. balance hydrogen and oxygen last 5. reduce coefficients if possible
1 Write the half-reactions and balance the key elements: 2  Add electron to compensate the oxidation state changes: 3  Since the half-reactions are balanced with respect to charges and number of atoms, no further work is required. 4  Just add the two equations and get a balanced equation.uide for writing and balancing half-reaction equations. 1  Identify the key element that undergoes an oxidation state change. 2  Balance the number of atoms of the key element on both sides. 3  Add the appropriate number of electrons to compensate for the change of oxidation state.