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
Because atoms are neither created nor destroyed in a reaction, a chemical equation must have an equal number of atoms of each element on each side of the arrow (i.e. the equation is said to be 'balanced'). Steps involved in writing a 'balanced' equation for a chemical reaction: 1  Experimentally determine reactants and products. 2  Write 'un-balanced' equation using formulas of reactants and products.