Hydroxides Samenvattingen, Aantekeningen en Examens

12 Reasons why the health inspector will close your pool - correct answer 1. pump filter not working for more than an hour 2. main drain is not visible 3. chemical readings out of range 4. no pool operator (15 minute grace period) 5. no lifeguard or cpr certs present 6. water is below the skimmer line 7. danger to the public 8. chlorinator is not working 9. health inspector is not allowed in 10. bathrooms + drains not working 11. flow rate is too low 12. no phone (landline) Measur...

What is lime and what is it used for? correct answersIt's a calcium-containing mineral, typically containing hydroxides/oxides . Lime is used to soften water [reduce hardness] and to precipitate phosphorous. What is alkalinity and where does it come from in natural waters? correct answersAlkalinity is the capability of water to neutralize acid without a significant change in pH. In natural waters, it primarily comes from carbonate and bicarbonate ions (CO3, HCO3), which react with free H+ io...

Equation for Magnesium reacting with warm water - CORRECT ANSWERS-Mg(s) + 2 H2O(l) -> Mg(OH)2 + H2 much slower reaction than with steam & no flame Which group 2 metals will react with cold water to form metal hydroxides? - CORRECT ANSWERS-Calcium, Strontium, Barium Observations of group 2 metals reacting with water to form hydroxides - CORRECT ANSWERS-- Effervescence - Metal dissolves - Solution increases in temperature - White precipitate forms (less down the group) - Solution/wat...

Edexcel A level Chemistry Questions With 100% Complete Solutions Ionisation energy trend in Group 2 - ANSWERS As you go down the group first ionisation energy decreases because: - Although nuclear charge is increasing - The electrons have an extra quantum shell of shielding making them easier to remove - They exist in a higher energy orbital (and/ or a further distance from the nucleus) Reactivity trend in group 2 - ANSWERS Group 2 elements become more reactive going down a gr...

Acids And Bases Lab Study Guide Test 2024. what are acids and bases according to the bronsted lowry theorem - correct answer acids are hydrogen ion donors, bases are hydrogen ion acceptors. what does the bronsted lowry theorem state - correct answer each acid has corresponding base, called the conjugate base, that is formed when acid loses hydrogen ion. what is the equation for the bronsted lowry theorem - correct answer HA + H₂O → H₃O⁺ + A⁻ acid ← hydronium conjugate base ...

Strong Acids And Bases Study Guide Test 2024. HBr - correct answer hydrobromic acid (strong acid/electrolyte) HCl - correct answer hydrochloric acid (strong acid/electrolyte) HI - correct answer hydroiodic acid (strong acid/electrolyte) HNO3 - correct answer nitric acid (strong acid/electrolyte) HClO4 - correct answer perchloric acid (strong acid/electrolyte) HF - correct answer hydrofluoric acid (weak acid/electrolyte) HC2H3O3 - correct answer acetic acid (weak acid/electroly...

Density - ANSWERmass/volume Law of Conservation of Mass - ANSWERmass reactants= mass products Law of Multiple Proportions - ANSWERatoms combine in fixed whole # ratios Alkali metals - ANSWERGroup 1 metals Alkaline earth metals - ANSWERGroup 2 metals Transition metals - ANSWERelements in groups 3-12 mol - ANSWER6.022x10^23 Limiting reactant - ANSWERreactant that's completely used up in a chemical reaction excess reactant - ANSWERreactant which doesn't get used up complet...

Atomic Radius, Nuclear Charge, Electron Shielding - What are the 3 things that affect first ionisation energy? Increase. More protons- stronger attraction. Not much extra shielding. - What is the general trend in ionisation energy across periods? And why? Decrease due to increased attraction between electrons and nucleus. - What is the trend in atomic radius across a period? Increase due to metallic bonds getting stronger. - What is the trend in boiling points across metals? Silicon. Stro...

Certified Pool Operator Test Review Questions and Answers 100% Pass 12 Reasons why the health inspector will close your pool - Correct Answer ️️ -1. pump filter not working for more than an hour 2. main drain is not visible 3. chemical readings out of range 4. no pool operator (15 minute grace period) 5. no lifeguard or cpr certs present 6. water is below the skimmer line 7. danger to the public 8. chlorinator is not working 9. health inspector is not allowed in 10. bathrooms + d...

Chemistry 115 Final Exam Questions with Verified Solutions Any ionic compound containing group IA or NH4+ cations are.... Always Soluble Ionic compounds containing NO3-, NO2-, ClO3-, ClO4-, C2H3O2-, & HCO3- anions are Always Soluble Ionic compounds containing Cl-, Br-, & I- anions are soluble EXCEPT when combined with... Ag, Hg, and Pb cations Ionic compound containing SO4^2- are soluble EXCEPT when combined with... Ag, Hg, Pb, Ca, Sr, Ba Ionic compounds containing So3^2-, S^2-, CO3^2-, PO4^...