An experiment to investigate whether concentration of acid has an
effect on the reaction rate of the reaction between Calcium Carbonate
and Hydrochloric Acid.
1. The key factor I plan to investigate and what I will do to make my
experiment a fair test
The factor that I plan to investigate is whether the concentration of
acid (the acid being HCl) has any effect on the rate of reaction
between Calcium carbonate and Hydrochloric acid. I will vary the
concentration and calculate rate of reaction, and calculate the effect
of the factor by measuring the amount of gas given of during the
reaction, and finding out how much gas is given of every 15 seconds. I
will collect the gas by bubbling it into a gas collection tube in a
water bath.
I will use five different concentrations 80%, 70%, 60%, 50%, and 40%
acid. I will mix acid with water to get the desired concentration, and
for each experiment I will keep the volume of the acid and water
combined at 50 ml. For example in order to 80% concentration I will
mix 40 ml of acid, and 10 ml of water. For each different
concentration I will conduct 3 identical experiments, and collect my
results every 15 seconds. I will then average out the three different
results for one particular time and produce one result. I will collect
8 results per an experiment. I will repeat any measurements that don't
appear to follow the general trend.
Also to make sure that results are accurate I will use a 100 ml
measuring tube with marking for every 1 cm3. I will measure the liquid
in a test tube with 1 cm3 marking.
I will conduct my experiment in the laboratory. The equation for this
experiment is:
CaCo3 + 2HCL CaCL2 + H2O + CO2
The variables I plan to control
1. Surface area: The surface area of each marble chip should be kept
relatively the same because due to collision theory if more surface
area is available the number of particles of solid reactant available
for collision will increase. Therefore more collisions can occur, and
it is likely there will be more collisions with sufficient energy to
successfully lead to a reaction. I might not be able to keep the
surface area of my marble chips exactly the same but I will attempt to
keep it as similar as possible.
2.Volume of liquid: I will keep the amount of liquid at 50 ml, because
if I don't keep the amount of liquid constant I will change the amount
of acid in contact with the marble chips, because if there is more HCL
In this lab, lab 4.3 Comparing the Concentrations of Saturated Solutions, we set out to find and compare the solubilities of two solids in water. In addition, we tested if solubility is a characteristic property of a solid in a given liquid. This lab allowed us to test and use a reliable way to measure the solubility of a solid. This lab can be replicated for any solid with the same procedure, thus it gives us a method to calculate solubility. The two solids we tested in this experiment were NaCl (Sodium Chloride) and NaNO3 (Sodium Nitrate).
Reflecting on your delivery and relating to further reading and research, write a personal analysis which considers the following:
Investigation to find out if changes in concentration of acid affect the rate of a chemical reaction
1. Observe my supervisor and other professionals at my practicum site as well as their relationships.
3.) If I were starting my own business, I wouldn’t just use one assessment method. I
every size of chip. By doing this I will find out if the rate of
What are the aspects or elements of the works on which you intend to focus?
Provide the short-term and long-term goals. What are the aspects to focus on immediately? What are areas will have to be addressed in the long run? How long will it take for the company to expand? When is the expected date of realizing the profits?
The first appeal is going to be talked about is ethos. When incorporating ethos into your
Neutralization Experiment AIM:- To investigate how heat is given out in neutralizing sodium hydroxide (NaOH) using different concentrations of Hydrochloric Acid. Background Information:- Substances that neutralize acids are called alkalis. An acid is a substance that forms hydrogen ions (H+ ) when placed in water. It can also be described as a proton donor as it provides H+ ions. An example of an acid is hydrochloric acid (HCl), Sulphuric acid (H2SO4) etc.
For this I have constructed a table to show aims that I need to meet
· Q. How will I decide on the values of the variables that I will be
4. They can influence the loyal persons for more people and our customer base can be increased.
to see when the x marked paper is not visible. I repeatedly did this 3
The goal of almost any interview is to collect testimonial evidence. Successful interviews just don’t happen. There are many aspects and steps that lead the way to a successful interview. Planning before conducting an interview is the first step, but before planning all interviewers must understand the basic needs of all interviewees. All humans share the same needs. An investigator must understand these basic human needs if they wish to become a successful interviewer. The basic human needs that all humans share are, control, belonging, and intimacy. Control is considered the need for security; everyone wants to be able to control their environment and what is happening around them. Belonging is the need for social recognition and approval. Intimacy is the need for love and affection, everyone wants to be loved or feel important to other people. These human needs must be incorporated in every interview and interrogation. Incorporating these needs is an important first step or first aspect to be considered by an investigator. Building up these human needs builds up the self-image and esteem on the interviewee. It is essential to build and maintain self worth of the interviewee, no one likes to feel humiliated or excluded. If these needs are understood and met the chances of having a successful interview are much greater. Having a positive attitude about everything you do is important. The same thing can be said for interviewing. Having a positive attitude going into an interview will have a positive effect on the outcome of the interview. A positive attitude is reflected to the interviewee and makes them more comfortable. No one wants to talk to someone who is negative. A positive attitude can impact the interview more that any other factor. Understanding human needs and the importance...