A student wants to prepare 400 mL of buffer with a pH of 4.90 using acetic acid and sodium acetate. a) What should be the acid-salt molar ratio for the buffer? b) If he prepares the solution at a HOAc concentration of 0.12M, how many grams of NaOAc must he add to obtain the desired pH?

Balance this equation co2(g) + h2o (g) show that the balanced equation obeys the law if conversation of mass

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Predict the reactants of this chemical reaction. that is, fill in the left side of the chemical equation. be sure the equation you submit is balanced. (you can edit both sides of the equation to balance it, if you need to.) note: you are writing the molecular, and not the net ionic equation. > cacl2(aq) + h20(l)