In step 4 of Station D, distilled water was added to the test tube. The color of the solution in the test tube after adding the distilled water is different from the color before the distilled water was added. Based on these observations, has a chemical or physical change occurred? Group of answer choices chemical change; the water reacted with the contents of the test tube physical change; the water did not react with the contents of the test tube chemical change; a color change is always due to a chemical change physical change; a color change is always due to a physical change

A hydrochloric acid solution will neutralize a sodium hydroxide solution. Part A Write a balanced chemical equation for the neutralization reaction. Express your answer as a chemical equation including phases. 0 - xa ΑΣΦ Submit Xb a b 016 a b A chemical reaction does not occur for this question. 18 Previous Answers Request Answer X Incorrect; Try Again X ? Review I Constants eriodic Table

A pair of students were mixing aqueous chemical solutions in a the Classes of Chemical Reactions lab experiment. They labeled their test tubes A, B and C. Which of the test tubes showed a reaction? A B All three test tubes reacted. Test tube B reacted. Test tube C reacted. Test tubes A and B reacted. Test tube A reacted

Cloudy Solving for a reactant in solution One way the U.S. Environmental Protection Agency (EPA) tests for chloride contaminants in water is by titrating a sample of silver nitrate solution. Any chloride anions in solution will combine with the silver cations to produce bright white silver chloride precipitate. Suppose an EPA chemist tests a 200. mL sample of groundwater known to be contaminated with iron(II) chloride, which would react with silver nitrate solution like this: FeCl₂(aq) + 2 AgNO3(aq) → 2 AgCl(s) + Fe(NO3),(aq) The chemist adds 29.0 mM silver nitrate solution to the sample until silver chloride stops forming. He then washes, dries, and weighs the precipitate. He finds he has collected 3.2 mg of silver chloride. Calculate the concentration of iron (II) chloride contaminant in the original groundwater sample. Round your answer to 2 significant digits. 4 e mg L Explanation Check X 99+ Ⓒ2022 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center | Accessibility