Dissociation constant

The concept of dynamic equilibrium can be understood using the properties of a titration of a strong base with a weak acid, including its equivalence point and half-equivalence point. The following equation demonstrates the dynamic equilibrium achieved when using a weak acid: The Ka value of a weak acid can be found experimentally using a pH meter along with the concept of equivalence point when titrating an acid and a base. One half of the weak acid has been titrated at the half-equivalence…

Have you ever heard about alkaline water? Do you really know what it is? When it comes to alkaline water, you should know this water is slightly basic. It has basic minerals, including magnesium, calcium and bicarbonate. All these compounds will bind to hydrogen ions in solution, making the water more basic. Moreover, this type of water refers to its pH level, which is a number that measures how alkaline a substance is on a scale of 0-14. For example, if something will have a pH level of 1, it…

Throughout this acid, base and buffer lab, this will allow each individual to gain an enhanced sense of knowledge of how these different aqueous solutions work as a buffer system or how they are unable to perform as buffer system mixed with two solutions together. This can be identified through the colour change to measure pH behaviour in several aqueous solutions, therefore the different factors that will cause the change of pH. This will gain understanding of how this relates to the biological…

mol NaOH). Using the molar mass of CH3COOH, the mass of acetic acid can be calculated, and compared to the mass of the overall vinegar solution (Thorne 86-87). These values can be compared to the theoretical values which state that the equilibrium constant of acetic acid is 1.8 x 10-5, and the percent mass of acetic acid in vinegar is 5%. Calculations/Discussion: Recorded data: Concentration of standardized NaOH Solution: 0.10 M Mass of Vinegar Used: 4.03 grams Volume of NaOH (mL) pH Volume…

to form hydronium ions, thereby lowering the pH and increasing the acidity of water. Water exposed to air is gentle in nature acidic because it absorbs small quantities of CO2 from the atmosphere. The CO2 breaks down to carbonic acid to undergo dissociation to release hydrogen ions into water, lowering the pH. Prior to that, acid added to water increases…

Accuracy and Precision Lab Report By Connor MacFarland 10.23.2016 IBC 1 Question What is the difference between accuracy and precision and how can we demonstrate the difference? MATERIALS Pencil Notebook Paper 100 mL Graduated Cylinder 1 Gallon of water Ruler Unmarked Plastic Container 3 different kinds of Rocks of different sizes Triple Beam Balance PROCEDURE Estimating Lengths Procedure A piece of notebook paper was torn into 8 rectangles Without a ruler, a line was drawn which…

Introduction: The purpose of this lab was to use the general chemical knowledge to identify 10 different unknown solutions. There are two main techniques that were used which are, measuring their pH, and, reacting all of the solutions together. Identifying an unknown solution is an essential skill for anyone who is going to work in a lab because many times, the label might not be accurate, or damaged. Procedure: Safety Precautions: Eye protection - Avoid skin contact. Procedure: Ten…

This report will discuss multiple experiments regarding chemical equilibrium. Chemical equilibrium is when both reactants and products are both equal to each other. If one is not equal to each other, than the direction of shift will move to where equilibrium has been tampered with. Throughout all the labs, we observed that with different chemicals we have different directions of shift. From acids to bases, we see that direction of shift can vary which leads to different conclusions. We…

B. Buffers. 1. Two solutions, A. being 1.0 x HCl, and B. being 0.10 M will be given, as well as buffer solution 1 M NaOH. 2. Have 25 mL of solution A. and B. in two separate beakers. 3. Check the pH of both solutions without any NaOH first. Then begin checking pH after 1 drop, then after 10 drops, and lastly 25 drops. After each set of drops be sure to mix solutions. 4. Compare both sets of pH to determine which had an easier time resisting change. C. Titration curves. 1. Insert NaOH into…

Scientists use a scale to measure how acidic or basic a liquid is. That scale is called a pH scale. The pH scale is a number from zero to fourteen. Accordingly, zero to seven liquids are considered acid. However, seven is considered a neutral, like distilled water. Therefore, eight to fourteen the liquids are considered basic. For instance, a pH of two is going to be an acidic liquid. Thus, a pH of twelve would be measured as a basic liquid. Additionally, a strip of litmus paper will…