What conclusions can you draw about the factors that affect the rate of solution formation? Be sure to support your claim with data from your experiment.

Explanation:

The factors that may affect the reaction are,

(1) temperature at which the reaction is carried out,

(2) surface area of the antacid tablet,

(3) concentration of bicarbonate salt.

(1) Temperature: It increases the rate of a reaction by decreasing the activation energy of the reaction.

(2) Surface area: By using powdered tablet rather than an entire one, the surface area of the tablet increases that makes the rate of reaction faster.

(3) Concentration: Increase in the concentration of the bicarbonate increases the possibility of antacid substance to come into contact of more bicarbonate. Thus, the rate of a reaction increases.

Steps:

(1) Temperature. (i) at 1st, the reaction is to be carried out at room temperature. (ii) with the aid of timing device the duration of the reaction time is required to be measured. (iii) Consecutive reactions are required to perform with increase in 1 oC temperature for each reaction and the endpoint time is required to be noted. (iv) plot a graph depicting the reaction time with corresponding temperature. (v) a negative slopre in graph will indicate increasing rate of reaction, \Delta time/\Delta temperature= -ve .

(2) Surface Area. (i) Reaction is to carried out with entire antacid tablet at first and the reaction rate is required to be measured. (ii) Then the reaction under same condition is required to be carried out with powdered antacid tablet and the duration of the reaction is to be measured. The reaction rate will be faster in case of powdered tablet.

(3) Concentration. (i) Concentration of the bicarbonate solution should be varied in increasing order. (ii) the reaction rate is required to be measured for each concentration. (iii) a graph should be plotted with reaction rate at different concentration. A negative slope in the plot indicates increased reaction rate with increasing concentration of bicarbonate. \Delta time/\Delta concentration= -ve .

Errors: Manual errors may occur in course of reaction rate measurement which can easily be overcome with the help of multiple measurements for same data.

question: ray weighs 100 kilograms, his wrestling partner, bobby, weighs 50 kilograms. if ray moves at 4 m s , how fast will bobby have to run at him to apply an equal amount of kinetic energy?

answer: 8 m/s he needs to run twice as fast to keep up so he has some work to do

explanation:   if the mass has units of kilograms and the velocity of meters per second, the kinetic energy has units of kilograms-meters squared per second squared.

question answered by

(jacemorris04)

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.