C3 Test 5.0 / 5 based on 1 rating ? ChemistryC3GCSEAQA Created by: Bossy149Created on: 27-04-16 19:48 Why is it easier to loose electron in outer shell in larger atoms Due to the shielding effect of the other atoms 1 of 17 Does reactivity increase or decrease down group 7 Decreases 2 of 17 Does reactivity increase or decrease down group 1 Increases 3 of 17 How is the modern periodic table arranged Atomic Number 4 of 17 How is hard water formed Gains Ca2+ ions 5 of 17 How is scum formed Calcium ions react with stearate (soap) 6 of 17 Soft water will easily form a _____ Lather 7 of 17 Why can hard water be temporary Because when it's heated it can be broken down into its original substances. Calcium ions can be removed 8 of 17 How does sodium carbonate make hard water soft Removes calcium ions by forming calcium carbonate precipitate 9 of 17 How does a catalyst lower activation energy Provides an alternative route for reaction 10 of 17 How do you calculate energy changed Energy absorbed - energy released 11 of 17 Products will have more energy in what reaction Endothermic 12 of 17 What pressure is produced in the haber process 200 atmospheres 13 of 17 What temperature is used in the haber process 450 degrees 14 of 17 What is recycled in the haber process Unreacted hydrogen and nitrogen 15 of 17 What does the compustion of alcohol produce Carbon dioxide and water 16 of 17 Formula for alcohols CnH2n+1OH 17 of 17
Comments
No comments have yet been made