CH 101 Exam 2 version 2 Spring 2012

1. Chemical reactions often give clues showing that they are occurring. State and explain three things that may signal a chemical reaction is occurring.

If a company needs to make 2.50*10^4 mol of sodium using the given reaction how many moles of NaBr should the company use in this reaction. A. 5.00*10^4 B. 8.33*10^3 C. 7.50*10^4 D. 2.50*10^4

______________contribute hydrogen ions (H+) to a solutionc. Acidsd. Compoundsa. Bases b. Isotopes

After completing each reaction, the chemicals must be properly disposed of. Which solution CANNOT be disposed of down the sink?   a. Nickel (II) Chloride and Sodium Chloride   b. Magnesium Metal and Hydrochloric Acid   c. Ammonium Chloride and Water   d. Lead (II) Nitrate and Sodium Dichromate

1. Precipitates are produced from a chemical reaction. Give at least 3 types of appearances or textures of precipitates.   2. Determine the strength of a Test Solution in millimolar concentration. [express answer up to 4 decimal places]   3.What gas (chemical name) is evolved when the odor observed is sour-like, and not too irritating to the nose?   4.Give at least 8 manifestations or observable results after a chemical reaction has completed.

w Roma 14 B. I A.. =マ 3. A student was given an unknown solid and was told to determine the cation and the anion present in the unknown. The student's unknown gave the following test results; i. When hydrochloric acid was added to a portion of the solution bubbles of a colorless odorless were observed. i. Another portion of the solution turned a blood-red color solution when potassium thiocyanate solution was added. gas a) Which ions were present? Cation Anion b) Name the unknown salt. c) Write the correct formula for the salt. 5. Another student's unknown gave the following test results: a portion of the solution of unknown gave a yellow precipitate with ammonium molybdate reagent. A flame test on some of the solution resulted in a bright yellow flame. a) Which ions are present? Cation Anion b) Name the unknown salt. c) Write the correct formula for the salt.

The two questions on the second photo are based on the table? How do I do them?

Experiment 9: Types of Reactions Prelab: Name: 1. What are five signs of a chemical reaction? a. COlur b. Gas c. d. Dubdes Chonge e. 2. The activity series is used to predict if what type of reaction will occur? 3. Use the activity series to decide which of the following reactions will occur. If the reaction occurs, write reaction and if it will not occur, write no reaction. Zn + Ni(NO3)2 → a. b. Zn + Mg(NO3)2 → 4. Balance the following reactions, using coefficients, and label the type of reaction (combination, decomposition, single-replacement, double-replacement, or combustion).

For the following unbalanced DR reaction, write out 1. the overall reaction including reactants and products. Each reactant and product must also have its state or phase included. The reaction must be balanced. 2. The total ion equation (TIE). 3. The net ionic equation (NIE)

____ HCl + ____ MgO ---> ____ H2O + ____ MgCl2What coefficients will balance the equation above? a. 1, 2, 2, 1 b. 2, 1, 2, 1 c. 2, 2, 1, 1 d. 2, 1, 1, 1

Translate ثريا جامعة الطفيلة التقنية. . . Quadratic Equation.. Afkar f Facebook Мy С PART A: Standardization of a Sodium Hydroxide Solution Mass of KHP = 0.2 g Molar mass of KHP = 204.44 g/mol V NaOH = 30 ml V¡ NaOH = 50 ml Moles of KHP [ Select] Volume of NaOH (ml) [ Select] Concentration of NaOH [ Select] Question 2 12 pts PART B: Molar Concentration of an monoprotic Acid Solution Volume of acid = 30 ml Concentration of NaOH = 0.1 M V NaOH = 20 ml V NaOH = 30ml 1O 立

What volume (mL) of 0.0755 M phosphoric acid can be neutralized with 171 mL of 0.304 M sodium hydroxide? A. 2070 B. 689 C. 230 D. 2480 E. 11.8

2. What ionic form of nutrient would most likely be easily leached/washed out from the soil? a. Cation b. Conjugate ion c. Anion d. Spectator ion

Chemistry

11 and 12

4. Part B.2. a Identify the chemicals necessary to produce CO2(g). b. Write a net ionic equation for the generation of CO2(g). 5. Part B.2. a. Identify the chemicals necessary to produce NH3(g). b. Write a net ionic equation for the generation of NH3(g). 6. Part B.2. Write the net ionic equation for an acid-base neutralization reaction. REDMI NOTE 9 AI QUAD CAMERA

Sodium chloride, silver nitrate, lead (II) nitrate, zinc sulfate, and magnesium chromate were dissolved together in a beaker of water. What are the spectator ions resulting from the solution? a.Mg2+, Na+, and NO3- b.CrO4 2-, Cl-, and SO4- c.Mg 2+, Zn2+, and Pb2+ d.A and C

please skip this if you have already answered. I will upvote if it is correct and complete. thank you

tudent weighs out a 14.0 g sample of , transfers it to a 300. mL volumetric flask, adds enough water to dissolve it and then adds water to the 300. mL tick mark. What is the molarity of iron(II) bromide in the resulting solution? Molarity = ___________M

6. IT Shift J F 141 HW5 Assignment Assignment Content C Question 1 Use "Add Content" to attach your work and Click "Submit" t Important: The due date is Monday, 9/28 (in 3 days). 1. Write the complete ionic equation and net ionic equation. Ide a). HI + Al(OH)3 --> b). CuCO3 + HBr --> C). NH4CI + Sr(OH)2 --> USB 3.0 Use the editor to format your answer ble G50 Details Do you have additio You can add text, images, and files t Add Conte

a. Write a chemical equation for the dissolution of chloric acid in water. Label the Bronsted acid (A), base (B), conjugate acid (CA), and conjugate base (CB) in the equation. b. Write a chemical equation for the reaction between chloric acid and potassium hydroxide. c. Write a net ionic equation for the reaction in b

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1. Calculate and report the following Molar Masses. Report final answer to the hundredth's place and include units: sodium hydroxide, potassium chloride, nitric acid, sulfuric acid, silver nitrate, sodium chloride, potassium hydroxide, and ammonium chloride. 2. What is the molar concentration of each of the following solutions? Report the final answer using appropriate significant figures. a. 3.00 moles of sodium hydroxide in 300. mL of solution. b. 6.00 moles of potassium chloride in 600 cc of solution. c. 85.5 g HNO3 in 3.07 Liters of solution. d. 92.00 g H₂SO4 in 843.0 cc of solution.

E O Home - AP Student.. 6 Elk Grové Unifled Constants | Peniodic Table Oxidation states are important for keeping track of electrons in oxidation-reduction reactions. Here are some general rules to remember: Neutral compounds • Atoms of a free element have an oxidation number of 0. • Monoatomic ions have an oxidation state equal to their charge. Polyatomic ions and neutral molecules have a charge equal to the In a neutral compound, the sum of the oxidation states is zero. Note that the sign of the oxidation states and the number of atoms associated with each oxidation state must be considered. In H2O, for example, each hydrogen atom has an oxidation state of +1 and each oxygen atom has an oxidation state of -2 for a total of 2(+1) + (-2) = 0. %3D charge on the species. • Metals in compounds have positive oxidation states. Group 1A and 2A metals have oxidations states of +1 and +2 respectively. • Nonmetals in compounds have oxidation states with the priority listed Part A What is the…

Analysis of the copper content of a penny, balancing unbalanced equations (Information in photo)

6. A sample of hydrochloric acid is standardized using sodium bicarbonate. Write the balanced chemical equation for the reaction of hydrochloric acid with sodium bi- carbonate, NaHCO,. a. Iment b. Calculate the molar concentration of the hydrochloric acid if 35.18 mL of hydrochloric acid was required to neutralize 0.450 g of sodium bicarbonate to a phenolphthalein end point. Calculate the mass percent concentration of hydrochloric acid using the molar concentration calculated in part b and assuming the density of the solution is 1.01 g/mL. c.

A __________ electrolyte only dissociates partially when dissolved in water

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Just need steps to the answer

1. An Element from Group 1A and Group 7A (Periods 2-6) shared a Chemical Bond which formed a solid precipitate. This entails that ____________ . 2. An Element from Group 5A and Group 6A shared a Chemical Bond. This entails that ____________ . 3. Mrs. Dane Richards, a well known PharmD, mixed two unknown chemicals. The mixture changes its colour after the two chemicals have interacted under heat. The resulting product was identified as 1-chloropropane. What is the type of reaction indicated above? 4. Element A belongs to Group 8A Period 2 and Element B belongs to Group 7A Period 2. Which of the following statement is TRUE.  5. Dr. Albert Apale, a well known Chemist, tested Random samples in the laboratory. The compounds were classified as Ionic, Saturated with 6 Carbon molecules and Unsaturated 6 Carbon molecules. Which of the following Samples is considered to be an Alkane. The results of the experiment were presented below. 6. Dr. Albert Apale, a well known Chemist, tested Random…