15. Sebuah taman bunga berbentuk persegi panjang dengan panjang 20 m dan lebar 15 m. Di bagian tengah taman tersebut dibuat jalan setapak pada diagonal taman. Panjang jalan tersebut adalah .... A. 30 m C. 24 m B. 25 m D. 18 m
Answer (4)
It depends on the solution. For example, a 1M solution of MgCl2 has a greater concentration of ions than a 1M solution of NaCl because MgCl2 breaks apart into 3 ions while NaCl only breaks into 2 ions. On the other hand, a 12M solution of NaCl has a greater concentration of ions than a 1M solution of MgCl2 because the NaCl solution is simply so much more concentrated with NaCl than the MgCl2 solution is with MgCl2.
The concentration of **ions **depend on the number of ions which can be produced from a substance on dissociation.
What are ions?
An** ion** can be defined as an atom or a molecule which has a** net electrical charge. There are 2 types of ions which are present : 1) cation 2) anion . The cation is the positively charged ion and anion is the negatively charged ion .** As they have opposite charges which are present on them they attract each other which results in the formation of ionic bond.
Ions which consists of single atom are ** called mono-atomic ions** while which ions** consists of two or more ions are known as poly-atomic ions . They are created by chemical interactions . The ions are very reactive in their gaseous state and rapidly react with oppositely charged ions which results in the formation in neutral molecules.They are formed on dissolution **of salts in liquid substances or by passing **current **through the solution to generate ions.
Learn more about** ions **,here:
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The largest concentration of ions in a solution is determined by the total number of ions produced from each solute. For example, 1 M CaCl₂ yields the highest ion concentration of 3 M, while 1 M NaCl yields 2 M. The concentration ultimately depends on the dissociation of the ionic compound in solution.
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Diketahui:Panjang taman = 20 mLebar taman = 15 mDiagonal taman (jalan setapak) adalah sisi miring segitigaGunakan rumus Pythagoras:[tex]Diagonal^{2} =Panjang^{2} + Lebar^{2}\\Diagonal^{2}=20^{2} + 15^{2} \\Diagonal^{2}=400+225=625\\Diagonal^{2}=\sqrt{625} =25[/tex]Jawaban: B. 25 m
