you are evaluating a group's poster during an argumentation session for a new project. which of the following critiques offered by the travellers to the group spokesperson use scientific concepts, theory, or laws to challenge the group's claim? (more than 1 answer is possible.) guiding question: which chemical equation best represents the reaction of sodium bicarbonate (nahco3) with acetic acid (ch3cooh)? claim: nahco3 ch3cooh --> h2co3 ch3coo- na evidence: chemical equation balances. ph paper of resulting solution is neutral. reasoning: law of conservation dictates that the mass of the products has to equal mass of the reactants. h2co3 is a weak acid and ch3coo- na is a weak base so they cancel each other out, leading to a ph 7 solution.