June 29, 2021

What ions exist in a NaOH solution?

What ions exist in a NaOH solution?

1 Answer. Sodium Hydroxide NaOH, is comprised of a positive sodium cation Na+ and a polyatomic hydroxide anion OH . In solution hydroxide OH is is typically insoluble but with a group IA alkali metal like sodium Na+ the ions will dissociate in solution.

What is the rate law for the crystal violet reaction?

Introduction. The rate law for this reaction is in the form: rate = k[CV+]m[OH]n, where k is the rate constant for the reaction, m is the order with respect to crystal violet (CV+), and n is the order with respect to the hydroxide ion.

What is K in first order reaction?

k is the first-order rate constant, which has units of 1/s. The method of determining the order of a reaction is known as the method of initial rates. The overall order of a reaction is the sum of all the exponents of the concentration terms in the rate equation.

What is 1st order reaction?

Definition of first-order reaction : a chemical reaction in which the rate of reaction is directly proportional to the concentration of the reacting substance — compare order of a reaction.

What is rate constant k?

The specific rate constant (k) is the proportionality constant relating the rate of the reaction to the concentrations of reactants. The rate law and the specific rate constant for any chemical reaction must be determined experimentally. The value of the rate constant is temperature dependent.

Does rate constant depend on pressure?

The majority of the rate constants were determined at a pressure of approximately 95 Torr. Given the close agreement between Howard’s low pressure results and our higher pressure values, we conclude that the rate constant does not have a significant pressure dependence for temperatures between 200 and 300 K.

Can K be negative?

No. A rate constant(k) cannot be negative because it is measuring how fast the concentration changes over time so it cannot be a negative value.

Is K negative or positive?

Rate constants (k) are always positive. Rates can be negative or positive depending on whether it’s for formation or decomposition. This is so the rates of formation and rates of decomposition could cancel out.

Why is there a negative in F =- KX?

The minus sign in F = -kx is there by convention; we think of F as the restoring force. When the spring is compressed, a positive force is required to extend it, and when it is extended, a negative force is required to shorten it, or restore it to its natural length.