1. Briefly describe in 2-3 sentences the contributions of any scientist whose work and research had some impact on any of the topics covered in this Chemistry grade 12 collage 2. List two personal choices of action that you can take to reduce the use of any compounds that are harmful to human health or the environment. In chemistry 3. Explain the process of balancing a reaction using oxidation numbers. What are the steps and the process required to achieve an electrically neutral reaction.

Q: 5. Fill in the blanks in the statements below about soil pH.  A soil with a pH of 4.9 is…

A: Answer: pH basically represents power of H+ ion concentration. Its value is equal to negative of…

Q: Which statement about ammonia and sodium hydroxide is correct? O A. They are both weak bases. O B.…

A: 4) ammonia is a week base and sodium hydroxide is a strong base.

Q: Measuring the change in __________ allows us to determine whether a reaction will require or release…

A: Measuring the change in what will allow us to determine whether a reaction will require or release…

Q: How does limiting and excess reagent affect the following chemical reactions? Please base it on the…

A: A question based on general chemistry, which is to be accomplished.

Q: A class organic compounds containing a six-membered ring with alternating double bonds that results…

A:

Q: A. REACTIONS OF HYDROCARBONS Three hydrocarbon samples were analyzed by various qualitative tests…

A: 1) Br2 in CCl4 Test- The bromine test is a qualitative test for the presence of unsaturation…

Q: Name Post-Laboratory Questions (Use the spaces provided for the answers and additional paper if…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: In the formation of copper(II) oxide from copper(II) hydroxide mixture, what do we need to do to…

A: Copper (II) hydroxide oh heating gives Copper(II) oxide . The balanced chemical reaction is…

Q: A 20.0 mL sample of an HCl solution is titrated with 27.4 mL of a standard solution of Ba(OH)2. The…

A:

Q: which of the following substances is commonly used to reduce soil acidity? Ammonium sulphate Sodium…

A: a) For reducing the acidity of the soil, we need a basic substance. Of the given options, only…

Q: When an acid reacts with an active metal, a. the hydronium ion concentration increases. b. the metal…

A: A chemical reaction occurs when the bonds between reactant molecules are broken and new bonds are…

Q: • Remember in an acid-base reaction, there is only the movement of a hydrogen atom from the acid to…

A: Reaction between acid base produces salt and water.

Q: A mixture contains Na2CO3, NaOH, and inert matter. A sample weighing 1.500 g requires 28.85 mL 0f…

A:

Q: 4. A student performs the HCl tests on the three solid samples as described in Step 5 of Part B and…

A: Explanation:Upon being heated, some substances undergo chemical changes, some undergo physical…

Q: what is meant by a hydrogenated oil? Why is this potentially dangerous to human health?

A: Different types of oil are used by people. Oil has healthy or unhealthy fats. Some oils have a mix…

Q: Suppose you test a sample of a carbonated beverage with concentrated nitric acid and 2.5% ammonium…

A: Carbonated drinks are those which contains the dissolved carbon dioxide. The pressence of carbon…

Q: 1. Place a few crystals of bismuth trichloride in a test tube and add 3 ml of water. Observations:…

A: In a chemical reaction, two or more reactant molecules react with each other to form product…

Q: Seawater contains a lot of different metal ions. Will gold coin tarnish in sea water?

A: Salt water consist of many different ions.

Q: SIZING THINGS UP: For each pair, indicate the LARGER quantity. If the two quantities are equal,…

A: #(a): When a chemical reaction takes place inside a solution, an endothermic reaction absorbs heat…

Q: heat

A:

Q: A white powder is added while baking breads and cakes to make them soft and fluffy. Write the name…

A: A mixture of weak acid and carbonate or bicarbonate forms a chemical powder called baking powder.…

Q: What is the difference between chemical species, an ion, and an element? 2. Provide examples of all…

A: Hello. Since more than one question has been posted, the first question shall only be answered in…

Q: In the space below show the balanced chemical reaction equations for the synthesis of Crystal Violet…

A: Grignard reagents are very reactive which react with ester to give alcohol .

Q: NB Assume the densities of all solutions are 1.0 g/ml and their specific heat capacities 4.184 1/g.…

A: We are given thermochemical data for the neutralization reaction between HCl(aq) and NH4OH(aq) and…

Q: Heroin and morphine (shown below) are odorless solids. Drug-sniffing dogs can sometimes locate…

A: Given that Heroin and morphine are odorless solids. But, heroin can be located by dogs because of a…

Q: A 500 mL sample of waste water contains 15.72 ug of mercury, Hg. If the density of the sample is…

A: The volume of the wastewater sample is = 500 mL The amount of mercury in this sample is = 15.72…

Q: . Write equations for the step- by-step ionization of succinic acid in water.

A: Molecular formula for succinic acid - C4H6O4

Q: Which of the statements given below is correct? A. Iodometry is a method in which 12 solution is…

A: A.Is correct statement The presence or absence of elementary iodine signals the end point of…

Q: Q4. What is the frequency (s ) of radiation that has a wavelength of 459 nm? A. 6.54 x 10 B. 6.54 x…

A:

Q: ce 24: Module 1 Assignment Booklet 18 For questions 5 to 9, read each question carefully. Decide…

A: Answer:- This question is answered by using the simple concept of type of chemical reactions.

Q: 2. Calculate the mass of the HCl solution used in the Mg/MgO reactions given that the density of 1M…

A: Concentration of HCl = 1 M  Density of HCl = 1.036 g/ml  Mass of HCl solution = ?

Q: Why do we use sodium hydroxide instead of a weaker base? What is the practical reason for the use of…

A: Sodium hydroxide is a strong base and sodium bicarbonate is a weaker base.  The practical reason,…

Q: Which symbols show that the contents of a product are flammable and corrosive? A. W y mobom exs www…

A: we have to select the sign that denotes the product contents are flammable and corrosive

Q: exothermic reaction

A: Answer (a)    :  The above given reaction is the exothermic . Because inthe reaction heat is…

Q: In the following equation for a chemical reaction, the notation (s), (I), or (g) indicates whether…

A: Reactants lie on left hand side of the arrow.  Products lie on the right hand side of the arrow. If…