CHEM MISC Activity B.3 Relationships in Acid-Base Reactions Lab Report Answered 2024.

CHEM MISC Activity B.3 Relationships in Acid-Base Reactions Lab Report Answered 2024. Activity B.3 Relationships in Acid-Base Reactions Lab Report Collective Analysis A variable is a property of an object that can take on different values. The relationships between four variables were explored in experiments A (Part I) and B (Part II). The variables were VHCl (volume of hydrochloric acid), NNaOH (total number of drops of sodium hydroxide) and VH2 O (volume of water), and T (temperature change). Variables can be categorized into different classes; this provides a structure to the data set that can help you to identify patterns (i.e., relationships between the values of two or more variables). In the sciences, experiments are designed to explore relationships between independent and dependent variables. 1. Identify the independent variable and dependent variable in Experiment A. Type of Variable Variable Name Experiment A Independent Variable Volume of HCl Dependent Variable Number of NaOH drops 1a) Briefly explain the reasons why you identified the variables above as independent or dependent. The volume of HCl is the variable that is being manipulated to observe the amount of NaoH required to neutralize the solution, therefore the volume of HCl, the independent variable, determines the amount of NaOH drops, the dependent variable, required to balance pH 1b) Describe the relationship between the independent and dependent variable in Experiment A. The independent variable, volume of HCl, determines the amount of NaOH drops, the dependent variable, required to neutralize the solution 1c). Consider experiment A in which the variable V H2 O changed values between test tubes containing the same VHCl (e.g., between test tubes A1 and A2). Was the relationship between the two variables V HCl and N NaOH affected by the variable V H2 O? Support your reasoning using data from the group file as evidence. [Hint: you may want to calculate average values of the dependent variable for each value of VH2 O] The variable VH2 O had no effect on the relationship between the two variables VHCl and NNaOH. The ratio between VHCl and NNaOH remained constant. While some variation did occur, it was statistically nonsignificant 2. Identify the independent variable and dependent variable in experiment B. Describe the relationship between these two variables. Type of Variable Variable Name Experiment B Independent Variable Volume of NaOH Dependent Variable Solution Temperature 2a) Briefly explain the reasons why you identified the variables above as independent or dependent. The volume of NaOH is the variable that is being manipulated to observe the change in temperature of the solution, therefore the volume of NaOH, the independent variable, determines the temperature, the dependent variable, of the solution. 2b) Describe the relationship between the independent and dependent variable in Experiment B. The independent variable, volume of NaOH, determines the temperature, the dependent variable, of the solution 2c) Consider Experiment B in which the variable VH2 O changed values between test tubes having the same V NaOH (e.g, between test tubes B3 and B4). Was the relationship between the two variables NNaOH and T affected by the variable V H2 O? Support your reasoning using data from the group file as evidence. [Hint: you may want to calculate average values of the dependent variable for each value of VH2 O] The variable VH2 O had an effect on the relationship between the two variables VNaOH and T. As VH2 O increased, the difference in initial and final temperature of the solution increased. In B3 VH2 O is 1.0mL and the average difference in temperature is 3.6 C. In B5 VH2 O is 3.4mL and the average difference in temperature is 5.5 C.