ou are asked to weigh 2 g of lithium and add it to 1500 ml of distilled water +2 drops of indicator, knowing that the density of water is 1 at room temperature while conducting this experiment. What type of reaction occurs? Write and balance the equation of this reaction. Is there a gas that will be emitted? How can you test that this gas was released

Solutions of calcium bromide and potassium sulfate are mixed in a beaker. CaSO4(s) forms as a precipitate. Which of the following correctly identifies the spectator ions in this experiment? (Choose all) A) there are no spectator ions in this reaction B C D E F SO₂²- Br CaSO4 Ca²+ K+

Determining the volume of base needed to titrate a given mas... A chemistry student weighs out 0.348 g of ascorbic acid (H,C,H,0), a diprotic acid, into a 250. mL volumetric flask and dilutes to the mark with distilled water. He plans to titrate the acid with 0.1800M NaOH solution. Calculate the volume of NaOH solution the student will need to add to reach the final equivalence point. Round your answer to 3 significant digits. mL dla Explanation Check O 2021 McGraw-Hill Education. All Rights Reserved Terms of Use Privacy Accessibility MacBook Air

assroom.collegeboard.org <11 of 11 0.0041 gram 0.0083 gram ©** 0.0092 gram A chemistry class is investigating contamination in different sources of water and discovers that one source of water may have some lead ions (Pb²+) in it. The students decide to perform an experiment to test for the presence of lead. The students take a sample of water to the lab and add solid NaI, which will precipitate any lead ions according to the following equation. 2 Nal(aq) + Pb²+ (aq) PbI₂ (s) + 2 Na+ (aq) 0.0184 gram 44% 10:49 If a 2000.0 mL sample of water has a lead ion concentration of 2.00 x 10-5 M and excess NaI is added to the sample, what is the mass of PbI2 collected at the end of the experiment? Submit (:D) : III = 19 f(x) 8

What is the brown gas (name and formula) that nitric acid reacting with copper produces? How can you tell that the gas produced in #1 makes an acid in water? How many moles of the gas in #1 are produced from 1 mole of copper? What color is a copper(II) nitrate when it is diluted in water? Videos : https://www.youtube.com/watch?v=c7U1N_Tc9MY&t=1s

S Eduphoria → CX Science Chemistry 4th NW DCA 22-23 | W COLOR THEME 13. Several JASON learning ambassadors for Aldine ISD recorded a demonstration for the students. They mixed two chemicals together and produced a 'golden rain'. The equation for the reaction is: KI + Pb(NO3)2 → KNO3 + PbI₂ The golden substance (image below) was found to be insoluble in water. Which of the following compounds is the precipitate? Q Q ZOOM < PREVIOUS 3 e d 8 C 9 10 t Oro 11 12 Oll y O 13 hp U O O O KNO3 CLEAR ALL ΚΙ O PbI₂ Answered 14 Pb(NC 15

Refer to the solubility curve below to answer this question. How many grams of KCIO3 will dissolve in 100 g of water at 50 °C? Grams of solute per 100 g H₂O 150 140 130 120 110 100 90 80 70 60 50 40 30 20 10 KI Blank 1: NH₂ NH37 8 NaNO3 KCIO3. KNO3 NHẠC, KCI Naci -Ce₂(SO4)3 ol 0 10 20 30 40 50 60 70 80 90 100 Temperature (°C)

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Ca* OH OH Ca* Ca* Ca* OH OH OH Ca* OH OH Ca OH OH Ca** OH Ca* 2+ Ca(OH) OH Саон A C Which beaker best depicts calcium hydroxide in a beaker of water? ов O A O D O E

esc N 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 10 F1 1 1 대 v 2 F2 Fe: Select the spectator ions in the following equation: CaCl2 (aq) + (NH4)2SO4 (aq) --> CaSO4 (s) + 2 NH4Cl (aq) 0 NH1+ SO4²- 2- Ca2+ CI1- There are no spectator ions. 000 000 F4 # 3 80 F3 $ 4 % 5 F5 MacBook Air F6 < C & 7 F7 * 8 DII F8 9 F9 O F1C -