1. Why dont we use potassium hypochlorite for bleach
  2. Side affects to this experiment

  3. Why does the CO2 gas quantity in Sodastream cartridges differ in different nations?
  4. Can you estimate actual phytase activity from measurements of phytase activity

  5. Home test for magnesium carbonate

  6. Does a gold detector exist?

  7. A glass of water with ice-cubes in it. Where's the water the coldest; at the top or bottom?

  8. Chemical reaction to produce 5 liter of gas

  9. House-hold chemistry experiments for a high-school student

  10. reference for proving that reaction take place in viable skin

  11. Why can't rust form without water?

  12. Why does gaseous HCl not change dry blue litmus paper to red?
  13. What fraction of the vapour in electronic cigarettes is water?

  14. Melting ice with salt - how does it start?

  15. Un-denaturing industrial alcohol
  16. Is dissolving salt a chemical reaction or a physical change?

  17. Liquid nitrogen to cool liquid?
  18. How to remove formaldehyde (smell) from clothes/jeans?

  19. Chemicals to clean natural stones
  20. Why is salt needed when using vinegar to clean pennies?

  21. What is the patina formed on copper pennies?
  22. Why does chocolate melt so easily?

  23. Marker dissipates on White board paint

  24. How can I make an acidic pen to burn paper on writing on it?
  25. Modifying the chemical composition of sea water
  26. Storing alcohol in a thermos bottle

  27. The coldest (the most endothermic) reaction
  28. How does calcium carbide artificially ripen fruits?
  29. Rust removal ended with black oxide on the metal?

  30. Plastic contaminant in the kitchen (from a heated PP bag) - toxicity, cleaning up

  31. Why would breathing pure oxygen be a bad idea?
  32. Do mixtures have a boiling point?

  33. Making ice from carbonated water

  34. Why is the Vitamin B complex, a "complex"?
  35. Why is paper sometimes yellow?
  36. Why does hand sanitizer turn into a liquid after coming out of the bottle?
  37. Why do shampoo ingredient labels feature the term "Aqua"?

  38. Why do certain mixtures foam and others don't? How to predict if a mixture will yield a foam?

  39. Why does hot oil fry things, but hot water does not?

  40. Why does water boil vegetables, but oil does not?

  41. How much yeast is necessary to produce the same amount of carbon dioxide that I exhale?
  42. Could muscarine be an antidote to atropine poisoning?

  43. Continuous series of inorganic hydrates (from mono- to deca-)

  44. Iron chemistry: acetates for ebonizing wood

  45. Why is the smell of car exhaust much stronger in winter?

  46. What's a good way to find out how much lead is in parts being used in toys?
  47. Why does soda explode if artificial sweetener is added?

  48. What structure is this?

  49. Do the Noble gases really have their outermost shell filled?

  50. Fireplace window: Can one influence how fast soot is building up?

  51. How do I lower the surface tension of water without using a detergent?

  52. What is the smell of 'burning' metal?

  53. Which chemical is responsible for making marker ink permanent?
  54. Methodology of stainless steel grading

  55. Waterproofing and recycling paper

  56. chemical possibility in oil - 8th graders have questions for a project

  57. Any way to guess what these crystals are?

  58. Is there a paper glue that is NOT dissolved by acetone?
  59. Can drinking a lot of water be fatal?

  60. How to tell between carbon powder or graphite powder?
  61. Is this model to explain children about oxidation and fire correct?
  62. Translucifying chemical?

  63. Is it harmful to mix Hydrogen Peroxide with oven cleaning spray?

  64. Identification of an aromatic compound for a quiz

  65. Lugol's iodine 5 % aqueous solution
  66. How do people know HCN smells like almonds?

  67. Why is compressed air flammable?

  68. Will squeezing lemon juice on top of foods with ferrocyanide additive release hydrogen cyanide gas?
  69. Does salt vaporise?

  70. Formulation solubility?

  71. Which fuels produce more or less soot in a diffusion flame, and how to predict that?

  72. Will a film of oil on water retard evaporation (of water) and prevent air and atmospheric impurities from diffusing into it?
  73. Pulling Calcium Phosphate from Animal Bones
  74. How to dissolve steel without affecting aluminium alloy

  75. Changing the color of bismuth crystals

  76. How to measure potassium/sodium ratio in salt?

  77. How does a combustion process produce carbon monoxide?

  78. Given advancements of computational power an machine learning, how is it still not possible to predict products from chemical reactions?

  79. How to remove paraffin wax drop from cam lense glass?

  80. Why isn't ethane used for cooking?

  81. Difference between Phase, heterogenous and state of matter and solution
  82. Why are water droplets shaped like that?

  83. Why does rock salt change colour when it's heated

  84. How quickly does ethanol evaporate?

  85. If salt crystals make a cube shape, what is this 'X' marking?
  86. Keeping an open, partially empty soda bottle bubbly longer

  87. What is the difference between lower explosive limit (LEL) and lower flammability limit (LFL) for hydrogen?
  88. Why there is no change in water level when salt is added?

  89. When the heat is absorbed by the ice then ice will melt to form liquid water

  90. What type of acid is found in tea?

  91. When I dissolve sugar in my cup of tea/coffee, does it become a liquid?

  92. Cationic Detergent with no odor
  93. can electrolyzed water that results in OH− anions accumulating at the cathode be used to disinfect the water?

  94. Windex and Red wine

  95. Hair Gel Derivative

  96. What is the reason a grain of salt alters the perceived bitterness of coffee by such a high degree?

  97. Would a button cell battery contain mercury? If so, why?

  98. Mercury metal: Not toxic?

  99. Does graphite burn?

  100. "Non-stick" action on ceramic-coated pans