When a weak acid ( HA ) is titrated with a strong base, such as NaOH what species are decreasing in concentration before the equivalence point is reached? Na + Na + and A − A − HA HA and H + H + ( H 3 O + ) ( H 3 O + ) Na + Na + and OH − OH − HA HA and A − A −

Arock can be broken down into different kinds of substances by physical processes. no chemical reactions are needed to separate different parts of a rock into pure substances. this is because a rock is a(n)

What is a metal replacement reaction

For the reaction, 4 a(g) + 3 b(g) => 2 c(g), the following data were obtained at constant temperature. experiment initial[a],mol/l initial [b],mol/l initial rate,m/min 1 0.200 0.150 5.00 2 0.400 0.150 10.0 3 0.200 0.300 10.0 4 0.400 0.300 20.0 which of the following is the correct rate law for the reaction? 1. rate = k[a]2[b]2 2. rate = k[a][b] 3. rate = k[a]2[b] 4. rate = k[a][b]2