Whereas, in potassium, due to the weaker electrostatic force than sodium, it … Thus, in potassium, the outermost electron is better shielded from the attractive force of the nucleus. Explain the reactivity trend in Group 7. Media Coverage | Potassium melts at 63 °C (see the melting points of the elements for the others).  Tick ( ) one box. By signing up, you agree to our Terms of Use and Privacy Policy. Distinguish between metallic and nonmetallic minerals. Find best tutors for Class 11 Tuition Classes by posting a requirement. More than 6.5 lakh verified Tutors and Institutes are helping millions of students every day and growing their tutoring business on UrbanPro.com. Though schools have significant roles to play in a child s life but certain developments and habits grow in a child, from parents end only. For the element pairs below, state which is more reactive and which is less reactive a. Calcium and lithium b. Blog | So sodium has a greater electrostatic force between nucleus and valence electrons which doesn't let it lose electrons easily. Join UrbanPro Today to find students near you. Use this information to complete the following word equations: copper + chromium sulfate → Preparing for entrance exams? ... thirds of the sodium chloride replaced by potassium chloride. How To Choose The Right School For Children? Calculate the empirical formula of this sodium oxide. ï¿»  Hydrogen is less reactive than sodium. Links Alkali Metals Revision Questions 2Li (s) + 2H 2 O (l) 2LiOH (aq) + H 2(g) How does Potassium React with Water? (c) is chlorine more or less reactive than iodine? Because of these factors, the outermost electron in potassium can be lost easily as … less reactive. (a) Sodium metal tarnishes in air to form a layer of sodium oxide on its surface. Why is lithium less reactive the sodium? School Tie-up | Points, 11 Explain why, in terms of their electronic configurations, potassium is more reactive than sodium. Join now for JEE/NEET and also  prepare for Boards In addition a more reactive metal will react more vigorously than a less reactive metal. K + H 2 O --> KOH + H 2 Both potassium and sodium possess one electron in their outer shell. School, college, university or an open entrance exam, certain rules stands the same for any occasion. Register Now, Hey there! The distance between the valence electron and the nucleus is less in sodium than potassium. (2) ... potassium 1 sodium 6 chloride 6 sulfate 7 hydrogencarbonate 235 25 of 26. Therefore, the outer shell electron in Na experiences a weaker nuclear attraction than in Li. Sorry, this phone number is not verified, Please login with your email Id. Why is hydrogen produced at the negative electrode and not sodium? Explain the ionisation of a weak acid. write a short note on Chemical formula of element​. So sodium has a greater electrostatic force between nucleus and valence electrons which doesn't let it lose electrons easily. Since only a few of the acid particles release H+ ions, the position of the equilibrium lies well to the left. ï¿» (1) Hence, potassium is more reactive than sodium. Properties: Soft metals that can be cut with a knife. These are less reactive than alkali metals such as sodium. More than 6.5 lakh verified Tutors and Institutes are helping millions of students every day and growing their tutoring business on UrbanPro.com. If the internet has made it s way to all aspects of human life, no far stands classrooms from it. Whether you are looking for a tutor to learn mathematics, a German language trainer to brush up your German language skills or an institute to upgrade your IT skills, we have got the best selection of Tutors and Training Institutes for you. Lithium is a smaller atom than sodium so the electrons are strongly attracted the nucleus. Edexcel GCSE You do not need any other materials. explain the Group 7 reactivity trend (d) (i) what do you observe if chlorine is bubbled into a solution of potassium iodide? Points, 13 Explain why copper does not react with hydrochloric acid: [2] Copper is less reactive than hydrogen [1] So it can’t displace hydrogen from the acid [1] c. Give two reasons why reaction with hydrochloric acid cannot be used to distinguish between the reactivities of sodium and potassium: [2] We receieved your request, Stay Tuned as we are going to contact you within 1 Hour. askiitians. Pay Now | 2.1.3 explain how the reactivity of metals is related to the tendency of a metal to form its positive ion. Using the word equation example for the reaction of potassium with sodium chloride, explain why this is a displacement reaction ... GCSE Practice Questions Privacy Policy | Use Coupon: CART20 and get 20% off on all online Study Material, Complete Your Registration (Step 2 of 2 ), Sit and relax as our customer representative will contact you within 1 business day. Centre Number Candidate Number ... Use the information in the diagrams to explain why sodium is more reactive than lithium. With new schools coming up, parents get utterly confused which school will be the best for their... Before sending children to school, parents hardly take the effort to well educate their children. 4. Read more. The ionisation of a weak acid is a reversible reaction, which sets up an equilibrium between the undissociated and dissociated acid. Careers | 16 of 26. These... 6 Exam Hall Tips To Follow, For Every Good Student. As a result, oxidation occurs at the zinc rod (the anode) and zinc metal loses electrons to become zinc ions, that is, Zn (s) - 2e---> Zn 2+ (aq) The electrons then flow from the zinc rod to the copper rod through the external circuit.