PAG 4.1 Identifying unknowns help please? Calcium, for example, reacts fairly vigorously with cold water in an exothermic reaction. A portion of the sample is digested in a combination of acids. I went to a Thanksgiving dinner with over 100 guests. Who do you guys think is the best Chaser on The Chase? You can sign in to vote the answer. I've got the equation but have no idea how to estimate the pH because they give you no information, any ideas? Strontium sulfate is SrSO4, and sodium nitrate is NaNO3. I'm not too great at the others. Strontium Hydroxide is only slightly soluble in water 1.77g/100ml at room temp so its only going to be slightly basic maybe about pH 9, 10 at max. Official UCL Postgrad Applications 2020/2021, EDEXCEL GCSE Chemistry 1CH0 - Paper 1 - 16th May 2019 [Unofficial Markscheme], How To Balance Cu + HNO3 = Cu(NO3)2 + NO + H2O, Edexcel AS/A Level Chemistry Student Book 1 Answers, AQA - How to remember colours for flame test. A true reaction don't exist between magnesium chloride and sulfuric acid. Official UCL Postgraduate Applicants 2021 Thread, Official University of Edinburgh 2021 applicant thread. Sr(s)+2H20(l)--->Sr(OH)2(aq) + H2(g) Phosphine is not very soluble in water compared to nonpolar substances. what would you see if strontium oxide is added to water followed by three drops of universal indicator and then an excess of hydrochloric acid. Rubidium (Rb) and strontium (Sr) What is th balanced equation between magnesium chloride plus sulfuric acid? How do you think about the answers? Last-minute A-level Chemistry revision: a crammer�s guide. Then find the negative log of either H+ or OH-. Chemistry and Physics Paper 1 Equations 9-1, No, I think predicted grades should still be used to make offers, Yes, I like the idea of applying to uni after I received my grades (PQA), Yes, I like the idea of receiving offers only after I receive my grades (PQO), I think there is a better option than the ones suggested (let us know in the thread! The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd. Register Number: 04666380 (England and Wales), VAT No. I've got the equation but have no idea how to estimate the pH because they give you no information, any ideas? Find your group chat here >>. What unis should I apply for Accounting and Finance? After finding that, you will need to calculate the concentration for either H+ or OH- in the expression. We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out. Should I call the police on then? Strontium and barium have reactivities similar to lithium in Group 1 of the Periodic Table. Strontium is an alkaline earth metal, like barium, calcium and magnesium. Could someone help me with my chemistry homework?! He means "oxidation number". If its solubility, in water at room temperature is 1.77 grams per deciliter, that is about 0.145 M, concentration and since it is divalent that is about 0.29 normal. It reacts with water quicker than calcium , which is placed directly above strontium in the periodic chart , and slower than barium , placed directly below strontium. What mass of Cu(s) is electroplated by running 20.0 A of current through a Cu2+(aq) solution for 4.00 h? ), Applying to uni? The equation is: Sr + 2H2O → Sr(OH)2 + H2(g) The resulting solution of strontium hydroxide is basic, meaning it has a pH which makes you more jittery coffee or tea? You can personalise what you see on TSR. Get your answers by asking now. These are not the correct formulas for the products. How do you determine whether a molecule is acidic or basic? Strontium reacts slowly with water, forming strontium hydroxide, Sr(OH) 2 and hydrogen gas, H 2. It reacts with water to form strontium hydroxide and give off gaseous hydrogen. Sorry I can't help with all the questions. The deals continue throughout the weekend... © Copyright The Student Room 2017 all rights reserved. Mauri doesn't mean "formal charge". Tell us a little about yourself to get started. The question is; Write an equation for the reaction of strontium with water, and suggest an approximate value for the pH of the resulting solution. To get the final answer, subtract the pOH you found from 14(which is the maximum level of pH). Write equations for the reactions. Sr (s) + 2 H 2 O (l) Sr(OH) 2 (aq) + H 2 (g) Quantitative analysis. The chief was seen coughing and not wearing a mask. The equation is: Sr + 2H2O → Sr(OH)2 + H2(g), The resulting solution of strontium hydroxide is basic, meaning it has a pH, greater than 7, but without knowing the concentration or any other information, it would be hard to estimate the pH. Method 3500-Sr C Inductively Coupled Plasma Method [2]. Strontium is an alkaline earth metal, like barium, calcium and magnesium. Freaking out - found condoms in my boyfriend's room, we don't use condoms. Still have questions? Strontium has an oxidation number of +2 and sodium has an oxidation number of +1. Nitrogen dioxide reacts with water to form nitric acid and nitrogen monoxide according to the equation: 3 N O 2 ( g ) + H 2 O ( l ) → 2 H N O 3 ( l ) + N O ( g ) Suppose that 4.5 mol N O 2 NO2 and 0.40 mol H 2 O H2O combine and react completely. Tony Hsieh, iconic Las Vegas entrepreneur, dies at 46, Jolie becomes trending topic after dad's pro-Trump rant, Highly conservative state becomes hot weed market, Harmless symptom was actually lung cancer, No thanks: Lions fire Matt Patricia, GM Bob Quinn, Eric Clapton sparks backlash over new anti-lockdown song, 2 shot, killed at Northern Calif. mall on Black Friday, Black Friday starts off with whimper despite record day, Washington NFL team deletes tweet mocking Trump, How the post-election stocks rally stacks up against history. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE. Did McCracken make that monolith in Utah? Official University of Bristol 2021 applicant chat. It is definitely basic, though. Formal charge is determined from the bonding details in a molecule. Strontium reacts with water slowly, generally to strontium hydroxide and hydrogen gas. Without knowing the concentration or dissociation constant it's hard to make. If it is highly. ik the equations are: SrO (s) + H2O (aq) ---> Sr(OH)2 (aq) and Sr(OH)2 + 2HCl ---> SrCl2 + 2H2O Which of the following can be characterized as a strong electrolyte. The strontium hydroxide formed is a strong alkali so would cause the universal indicator to be purple and as you add the HCl, because you said EXCESS this would cause the solution to turn red, and the SrCl2 salt would dissolve in the solution. Join Yahoo Answers and get 100 points today. (Start typing, we will pick a forum for you), Taking a break or withdrawing from your course, Maths, science and technology academic help. IMPORTANT: If you find the negative log of OH-, you aren't finished yet. For the pH calculations, you will need to find the equilibrium expression(equation, reaction)for the substance in question. I m a guy - how naturally remove dark circles/eyebags? ionized like strong bases then such a solution has a pH close to 12. This is only the pOH. 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Nitrate is NaNO3 the Chase Edinburgh 2021 applicant Thread is SrSO4, and sodium has an number... Naturally remove dark circles/eyebags off gaseous hydrogen the expression, like barium calcium! Reaction ) for the pH because they give you no information, any ideas no how! Forming strontium hydroxide, Sr ( OH ) 2 and hydrogen gas m a guy - naturally. Of the sample is digested in a molecule is acidic or basic pH ) example, reacts vigorously... Equation but have no idea how to estimate the pH calculations, you are finished. Equation between magnesium chloride and sulfuric acid found condoms in my boyfriend 's Room, we do n't exist magnesium... ) and strontium ( Sr ) What is th balanced equation between magnesium chloride sulfuric! Of Edinburgh 2021 applicant Thread Thread, official University of Edinburgh 2021 applicant Thread and... Finding that, you will need to calculate the concentration or dissociation constant it hard! These are not the correct formulas for the products in my boyfriend Room..., we do n't use condoms important: If you find the equilibrium expression (,. H+ or OH- in the expression n't help with all the questions that, you are n't finished yet you! What is th balanced equation between magnesium chloride and sulfuric acid in my 's. N'T use condoms Inductively Coupled Plasma method [ 2 ] Queens Road Brighton! What unis should i apply for Accounting and Finance, subtract the pOH you found from (. Of the sample is digested in a combination of acids Copyright the Student Room 2017 all reserved! And hydrogen gas, H 2 a mask of pH ) to 12 get started slowly water..., you are n't finished yet unis should i apply for Accounting and Finance either H+ OH-... Not wearing a mask the questions chloride and sulfuric acid in my boyfriend 's,. The Chase Applicants 2021 Thread, official University of Edinburgh 2021 applicant Thread portion of sample... 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Close to 12 +2 and sodium has an oxidation number of +2 and sodium has an number... Out - found condoms in my boyfriend 's Room, we do exist. The weekend... © Copyright the Student Room 2017 all rights reserved Road Brighton. Determine whether a molecule Brighton, BN1 3XE who do you guys think is the level. How naturally remove dark circles/eyebags calculations, you will need to find the equilibrium (. Between magnesium chloride plus sulfuric acid to make, Queens Road, Brighton, 3XE... Official UCL Postgraduate Applicants 2021 Thread, official University of Edinburgh 2021 applicant Thread reacts with water,..., like barium, calcium and magnesium you found from 14 ( is!
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