Electrolytes (Grade 9)
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Electrolytes
1.
Which of the following statements correctly describes electrolytes?
- Electrolytes always contain metals
- Electrolytes all have a pH value of 7
- Electrolytes have low melting points
- Electrolytes are strong conductors of electricity in solution
2.
Which of the following statements is NOT true about electrolytes?
- They conduct electricity in solution
- They conduct electricity in the solid phase
- They typically will form positively-charged and negatively-charged particles in solution
- None of the above
3.
Which of the following is an electrolyte?
- Cu
- [math] H_2S [/math]
- ICl
- HCl
4.
Which of the following is an electrolyte?
- [math] Ca(OH)_2 [/math]
- [math] H_2 [/math]
- K
- [math] SO_2 [/math]
5.
Which of the following is a nonelectrolyte?
- [math] CH_3 COOH [/math]
- KOH
- [math] H_2 SO_4 [/math]
- [math] C Cl_4 [/math]
6.
Which of the following compounds is NOT an electrolyte?
- ethanoic acid
- sodium bicarbonate
- methanol
- sodium hydroxide
7.
Based on considerations of solubility, which of the following salts would be the weakest electrolyte?
- [math] NaClO_3 [/math]
- [math] CaCl_2 [/math]
- [math] Na_2 SO_4 [/math]
- AgCl
8.
Which of the following represents the ions present in an aqueous solution of [math] H_3 PO_4 [/math]?
- [math] H_3 O^[+] [/math] and [math] PO_4^[3-] [/math]
- [math] H^[+] [/math] and [math] PO_4^[+] [/math]
- [math] H^[-] [/math] and [math] PO_4^[3+] [/math]
- [math] H^[+] [/math] and [math] PO_4^[3-] [/math]
9.
Complete the following equation for the dissociation of HCl:
HCl (aq) [math] rarr [/math] ?
HCl (aq) [math] rarr [/math] ?
10.
Complete the equation for the dissociation of a base:
NaOH (aq) [math] rarr [/math] ?
NaOH (aq) [math] rarr [/math] ?
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