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Need Help with Chemistry! Can Someone Please Help Me with Grade 9 Chemistry?
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Seeking help with chemistry, specifically with grade 9 topics. Need an explanation and answer.
Question 1: Dissolution equation and cation moles in a solution of rubidium chromate. Question 2: Concentration of chromate ion in a saturated solution of CaCrO4. Question 3: Substances that conduct electricity. Question 4: Identifying the anion in a solution. Question 5: Balanced chemical equation for the dissolution of magnesium bromide. The coefficient of the solvated anion. Question 6: Formula for the dissolution of aluminum perchlorate. Question 7: Identifying compounds that can be dissolved in water for a 0.2 M solution. Question 8: Identifying precipitates from mixed solutions.
Chemistry questions: 1) Dissolution equation and cation moles in rubidium chromate solution. 2) Concentration of chromate ion in a saturated solution of CaCrO4. 3) Substances conducting electricity. 4) Identifying anion in a solution. 5) Balanced chemical equation for magnesium bromide dissolution. 6) Formula for aluminum perchlorate dissolution. 7) Compounds dissolved in water for 0.2 M solution. 8) Identifying precipitates from mixed solutions.
Need help with chemistry!
Can someone please please please help me with grade 9 chemistry...
I don't understand the topic of at all ><
It would be nice if you will give an explanation as well as the answer
1) Write down the dissolution equation for rubidium chromate dissolving in water. (Chromate is a polyatomic ion with the formula CrO42-.) If two moles of the ionic compound are dissolved, then how many moles of the CATION are present in the solution?
2) Calculate the concentration of chromate ion, CrO42–, in a saturated solution of CaCrO4 (Ksp=7.1×10^–4)
3) Substances which will conduct electricity in the form given:
- FeSO4(s)
- 1M HNO3 in water
- sand
- 0.1M glucose (sugar) water
- 0.1M solution of lithium sulphate
4) A solution is known to contain only one type of anion. Addition of Tl1+ ion to the solution had no apparent effect (all ions remained in solution), but addition of Ba2+ ion resulted in a precipitate. Which anion is present?
- SO42-
- Cl1-
- I1-
- NO31-
5) Write the balanced chemical equation for the dissolution of magnesium bromide. What is the coefficient in front of the solvated anion?
6) Write the formula for the dissolution of aluminum perchlorate in water.
7) Select ALL of the following compounds which can be dissolved in water to prepare a 0.2 M aqueous solution. (Hint: use solubility rules)
- ammonium sulfate
- lead(II) acetate
- aluminium perchlorate
- mercury(I) bromide
- silver chloride
- copper(I) thiocyanate
8 ) Each of the following pairs of 0.2 M aqueous solutions are mixed. Which mixture results in the formation of a precipitate?
- ammonium acetate + sodium hydroxide
- barium iodide + zinc nitrate
- manganese(II) chloride + magnesium acetate
- sodium sulfate + barium chloride
Thanks :D
I'll suggest you to go to web called " openstudy " and ask them to help you out in English.
I'm always using openstudy for math
It's really good web.
Good luck
